./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.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_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/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_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/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_a820c62e-2b17-46e4-877e-4dc2663fb9ee/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 e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:28:18,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:28:18,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:28:18,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:28:18,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:28:18,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:28:18,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:28:18,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:28:18,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:28:18,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:28:18,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:28:18,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:28:18,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:28:18,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:28:18,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:28:18,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:28:18,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:28:18,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:28:18,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:28:18,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:28:18,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:28:18,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:28:18,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:28:18,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:28:18,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:28:18,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:28:18,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:28:18,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:28:18,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:28:18,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:28:18,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:28:18,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:28:18,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:28:18,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:28:18,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:28:18,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:28:18,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:28:18,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:28:18,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:28:18,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:28:18,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:28:18,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 18:28:18,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:28:18,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:28:18,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:28:18,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:28:18,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:28:18,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:28:18,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:28:18,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:28:18,719 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:28:18,720 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:28:18,720 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:28:18,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:28:18,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:28:18,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:28:18,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:28:18,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:28:18,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:28:18,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:28:18,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:28:18,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:28:18,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:28:18,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:28:18,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:28:18,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:28:18,721 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_a820c62e-2b17-46e4-877e-4dc2663fb9ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2021-12-06 18:28:18,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:28:18,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:28:18,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:28:18,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:28:18,915 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:28:18,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-06 18:28:18,957 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/data/92e324e5f/d699ac02cd124a5cb059b3f67df6ede4/FLAGd478fce40 [2021-12-06 18:28:19,351 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:28:19,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-06 18:28:19,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/data/92e324e5f/d699ac02cd124a5cb059b3f67df6ede4/FLAGd478fce40 [2021-12-06 18:28:19,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/data/92e324e5f/d699ac02cd124a5cb059b3f67df6ede4 [2021-12-06 18:28:19,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:28:19,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:28:19,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:19,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:28:19,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:28:19,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3389ff45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19, skipping insertion in model container [2021-12-06 18:28:19,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:28:19,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:28:19,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:19,604 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:28:19,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:19,652 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:28:19,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19 WrapperNode [2021-12-06 18:28:19,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:19,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:19,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:28:19,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:28:19,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,684 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-12-06 18:28:19,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:19,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:28:19,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:28:19,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:28:19,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:28:19,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:28:19,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:28:19,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:28:19,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (1/1) ... [2021-12-06 18:28:19,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:28:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:19,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:28:19,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:28:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:28:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:28:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:28:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:28:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:28:19,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:28:19,826 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:28:19,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:28:19,961 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:28:19,967 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:28:19,967 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 18:28:19,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:19 BoogieIcfgContainer [2021-12-06 18:28:19,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:28:19,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:28:19,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:28:19,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:28:19,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:28:19" (1/3) ... [2021-12-06 18:28:19,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781e0c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:19, skipping insertion in model container [2021-12-06 18:28:19,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:19" (2/3) ... [2021-12-06 18:28:19,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781e0c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:19, skipping insertion in model container [2021-12-06 18:28:19,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:19" (3/3) ... [2021-12-06 18:28:19,977 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-12-06 18:28:19,982 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:28:19,982 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-06 18:28:20,014 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:28:20,021 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 18:28:20,021 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-06 18:28:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:28:20,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 18:28:20,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896286085] [2021-12-06 18:28:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,195 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 18:28:20,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896286085] [2021-12-06 18:28:20,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896286085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:28:20,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988175067] [2021-12-06 18:28:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:20,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,233 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,279 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-12-06 18:28:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:20,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:28:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,289 INFO L225 Difference]: With dead ends: 78 [2021-12-06 18:28:20,290 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 18:28:20,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,295 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 18:28:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2021-12-06 18:28:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 18:28:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-06 18:28:20,324 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2021-12-06 18:28:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,324 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-06 18:28:20,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-06 18:28:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:28:20,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:28:20,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-06 18:28:20,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358399254] [2021-12-06 18:28:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,390 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 18:28:20,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358399254] [2021-12-06 18:28:20,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358399254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:28:20,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043556253] [2021-12-06 18:28:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:28:20,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:28:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:28:20,394 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,419 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-06 18:28:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:28:20,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:28:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,420 INFO L225 Difference]: With dead ends: 42 [2021-12-06 18:28:20,420 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 18:28:20,421 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 18:28:20,422 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 18:28:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 18:28:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-06 18:28:20,429 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-06 18:28:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,429 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-06 18:28:20,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-06 18:28:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:28:20,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:28:20,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-06 18:28:20,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078686701] [2021-12-06 18:28:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,496 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 18:28:20,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078686701] [2021-12-06 18:28:20,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078686701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:28:20,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003988010] [2021-12-06 18:28:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:20,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:20,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,499 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,555 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-12-06 18:28:20,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:20,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:28:20,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,557 INFO L225 Difference]: With dead ends: 75 [2021-12-06 18:28:20,557 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 18:28:20,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:28:20,559 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 18:28:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2021-12-06 18:28:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-06 18:28:20,566 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2021-12-06 18:28:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,566 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-06 18:28:20,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-06 18:28:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:28:20,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:28:20,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-06 18:28:20,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109592584] [2021-12-06 18:28:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,620 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 18:28:20,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109592584] [2021-12-06 18:28:20,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109592584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:28:20,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035077961] [2021-12-06 18:28:20,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:20,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,623 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:28:20,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,648 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-06 18:28:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-06 18:28:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,649 INFO L225 Difference]: With dead ends: 43 [2021-12-06 18:28:20,649 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 18:28:20,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,651 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 18:28:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-06 18:28:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 18:28:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-06 18:28:20,656 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 9 [2021-12-06 18:28:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,657 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-06 18:28:20,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:28:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-06 18:28:20,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:28:20,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:28:20,658 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-06 18:28:20,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871619128] [2021-12-06 18:28:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,693 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 18:28:20,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871619128] [2021-12-06 18:28:20,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871619128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:28:20,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187870294] [2021-12-06 18:28:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:20,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:20,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,695 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:28:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,716 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-06 18:28:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:20,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-06 18:28:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,718 INFO L225 Difference]: With dead ends: 76 [2021-12-06 18:28:20,718 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 18:28:20,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,720 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 18:28:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-12-06 18:28:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-12-06 18:28:20,725 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 9 [2021-12-06 18:28:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,725 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-12-06 18:28:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:28:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-12-06 18:28:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:28:20,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:28:20,726 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-06 18:28:20,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132522983] [2021-12-06 18:28:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,748 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 18:28:20,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132522983] [2021-12-06 18:28:20,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132522983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:28:20,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668077601] [2021-12-06 18:28:20,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:28:20,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:28:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:28:20,750 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:28:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,765 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-12-06 18:28:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:28:20,766 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), 0 states have call successors, (0), 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 9 [2021-12-06 18:28:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,766 INFO L225 Difference]: With dead ends: 52 [2021-12-06 18:28:20,767 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 18:28:20,767 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 18:28:20,768 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 18:28:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 18:28:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 18:28:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-06 18:28:20,774 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 9 [2021-12-06 18:28:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,774 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-06 18:28:20,774 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), 0 states have call successors, (0), 0 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 18:28:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-06 18:28:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:28:20,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:28:20,775 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-06 18:28:20,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059676326] [2021-12-06 18:28:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,831 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 18:28:20,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059676326] [2021-12-06 18:28:20,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059676326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:28:20,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773685251] [2021-12-06 18:28:20,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:28:20,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:28:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:28:20,834 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:28:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,882 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-06 18:28:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:28:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-06 18:28:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,883 INFO L225 Difference]: With dead ends: 76 [2021-12-06 18:28:20,883 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 18:28:20,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:28:20,884 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 73 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 18:28:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-12-06 18:28:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:28:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-12-06 18:28:20,890 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2021-12-06 18:28:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,890 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-12-06 18:28:20,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:28:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-12-06 18:28:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:28:20,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:28:20,892 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,892 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-06 18:28:20,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110436148] [2021-12-06 18:28:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,927 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 18:28:20,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110436148] [2021-12-06 18:28:20,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110436148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:20,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:20,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:28:20,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421573415] [2021-12-06 18:28:20,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:20,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:20,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,929 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:20,947 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-12-06 18:28:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:28:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:20,948 INFO L225 Difference]: With dead ends: 53 [2021-12-06 18:28:20,948 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 18:28:20,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:20,949 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:20,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:20,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 18:28:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 18:28:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-12-06 18:28:20,954 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2021-12-06 18:28:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,954 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-12-06 18:28:20,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-12-06 18:28:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:28:20,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,955 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:28:20,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 18:28:20,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969064421] [2021-12-06 18:28:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:21,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:21,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969064421] [2021-12-06 18:28:21,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969064421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:21,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914123894] [2021-12-06 18:28:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:21,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:21,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:21,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:21,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:28:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:21,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:28:21,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:21,123 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 9 treesize of output 11 [2021-12-06 18:28:21,129 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 18:28:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:21,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:21,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914123894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:21,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:21,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-06 18:28:21,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379712996] [2021-12-06 18:28:21,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:21,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:28:21,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:28:21,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:28:21,340 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:21,442 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-06 18:28:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:28:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:28:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:21,443 INFO L225 Difference]: With dead ends: 116 [2021-12-06 18:28:21,443 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 18:28:21,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:28:21,445 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 205 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:21,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 183 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 18:28:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2021-12-06 18:28:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-06 18:28:21,450 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-12-06 18:28:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:21,451 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-06 18:28:21,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-06 18:28:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:28:21,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:21,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:21,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:21,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:21,653 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2021-12-06 18:28:21,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:21,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682153551] [2021-12-06 18:28:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:21,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:21,680 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 18:28:21,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:21,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682153551] [2021-12-06 18:28:21,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682153551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:21,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:21,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:28:21,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335281881] [2021-12-06 18:28:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:21,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:28:21,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:28:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:28:21,682 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:21,710 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-06 18:28:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:28:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:28:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:21,711 INFO L225 Difference]: With dead ends: 47 [2021-12-06 18:28:21,711 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 18:28:21,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:28:21,712 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:21,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 18:28:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-06 18:28:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-06 18:28:21,715 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2021-12-06 18:28:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:21,715 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-06 18:28:21,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-06 18:28:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:28:21,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:21,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:21,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:28:21,716 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2021-12-06 18:28:21,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:21,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375224488] [2021-12-06 18:28:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:21,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:21,766 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 18:28:21,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375224488] [2021-12-06 18:28:21,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375224488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:21,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:21,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:28:21,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860203019] [2021-12-06 18:28:21,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:21,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:28:21,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:21,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:28:21,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:28:21,768 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:21,815 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-06 18:28:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:28:21,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:28:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:21,816 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:28:21,816 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 18:28:21,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:28:21,817 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:21,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 18:28:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-06 18:28:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:28:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-06 18:28:21,821 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-12-06 18:28:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:21,821 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-06 18:28:21,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-06 18:28:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:28:21,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:21,822 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:21,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:28:21,822 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-06 18:28:21,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:21,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844833194] [2021-12-06 18:28:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:21,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:21,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844833194] [2021-12-06 18:28:21,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844833194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:21,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996373838] [2021-12-06 18:28:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:21,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:21,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:21,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:21,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:28:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:28:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:21,931 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:28:21,931 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:28:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:21,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:22,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996373838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:22,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:22,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-06 18:28:22,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197494650] [2021-12-06 18:28:22,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:22,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:28:22,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:28:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:28:22,127 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 18:28:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:22,204 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-06 18:28:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:28:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:28:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:22,205 INFO L225 Difference]: With dead ends: 91 [2021-12-06 18:28:22,205 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 18:28:22,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:28:22,206 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 209 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:22,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 170 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:22,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 18:28:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2021-12-06 18:28:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-06 18:28:22,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-06 18:28:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:22,209 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-06 18:28:22,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 18:28:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-06 18:28:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:28:22,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:22,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:22,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:22,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:28:22,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2021-12-06 18:28:22,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:22,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23138489] [2021-12-06 18:28:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:22,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:22,537 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 18:28:22,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:22,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23138489] [2021-12-06 18:28:22,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23138489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:22,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:22,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:28:22,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044497371] [2021-12-06 18:28:22,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:22,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:28:22,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:28:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:28:22,541 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:22,597 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-06 18:28:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:28:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:28:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:22,597 INFO L225 Difference]: With dead ends: 46 [2021-12-06 18:28:22,597 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 18:28:22,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:28:22,598 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:22,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:22,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 18:28:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-06 18:28:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 18:28:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-06 18:28:22,600 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2021-12-06 18:28:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:22,600 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-06 18:28:22,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-06 18:28:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:28:22,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:22,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:22,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:28:22,601 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:22,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2021-12-06 18:28:22,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:22,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976065104] [2021-12-06 18:28:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:22,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:22,657 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 18:28:22,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976065104] [2021-12-06 18:28:22,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976065104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:22,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:22,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:28:22,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966704588] [2021-12-06 18:28:22,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:22,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:28:22,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:28:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:28:22,658 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:22,712 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-06 18:28:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:28:22,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:28:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:22,713 INFO L225 Difference]: With dead ends: 49 [2021-12-06 18:28:22,713 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 18:28:22,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:28:22,714 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:22,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 85 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 18:28:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-12-06 18:28:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 18:28:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-06 18:28:22,716 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-12-06 18:28:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:22,717 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-06 18:28:22,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-06 18:28:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:28:22,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:22,717 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] [2021-12-06 18:28:22,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:28:22,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2021-12-06 18:28:22,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:22,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376754818] [2021-12-06 18:28:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:22,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:22,770 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 18:28:22,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376754818] [2021-12-06 18:28:22,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376754818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:22,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:22,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:28:22,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261155100] [2021-12-06 18:28:22,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:22,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:22,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:22,771 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:28:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:22,783 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-06 18:28:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:22,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-06 18:28:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:22,784 INFO L225 Difference]: With dead ends: 46 [2021-12-06 18:28:22,784 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 18:28:22,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:28:22,784 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:22,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 18:28:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-06 18:28:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 18:28:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-06 18:28:22,786 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2021-12-06 18:28:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:22,787 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-06 18:28:22,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:28:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-06 18:28:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:28:22,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:22,787 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:22,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:28:22,788 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2021-12-06 18:28:22,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:22,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897118222] [2021-12-06 18:28:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:22,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:22,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:22,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897118222] [2021-12-06 18:28:22,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897118222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:22,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:22,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:28:22,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944734845] [2021-12-06 18:28:22,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:22,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:28:22,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:22,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:28:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:28:22,868 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:28:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:22,966 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-06 18:28:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:28:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-06 18:28:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:22,967 INFO L225 Difference]: With dead ends: 53 [2021-12-06 18:28:22,967 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 18:28:22,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:28:22,968 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:22,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 196 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 18:28:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 18:28:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 18:28:22,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2021-12-06 18:28:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:22,970 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 18:28:22,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:28:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 18:28:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:28:22,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:22,970 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:22,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:28:22,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2021-12-06 18:28:22,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:22,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943459712] [2021-12-06 18:28:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:22,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:23,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:23,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943459712] [2021-12-06 18:28:23,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943459712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:23,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:23,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 18:28:23,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628195658] [2021-12-06 18:28:23,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:28:23,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:23,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:28:23,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:28:23,075 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:28:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:23,200 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-06 18:28:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:28:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-06 18:28:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:23,200 INFO L225 Difference]: With dead ends: 48 [2021-12-06 18:28:23,200 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 18:28:23,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:28:23,201 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:23,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 170 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 18:28:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-06 18:28:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-06 18:28:23,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-12-06 18:28:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:23,203 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-06 18:28:23,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:28:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-06 18:28:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:28:23,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:23,204 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:23,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:28:23,204 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2021-12-06 18:28:23,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:23,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740522812] [2021-12-06 18:28:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:23,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:23,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:23,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740522812] [2021-12-06 18:28:23,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740522812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:23,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844180008] [2021-12-06 18:28:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:23,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:23,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:23,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:23,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:28:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:28:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:23,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:23,578 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 18:28:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:23,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844180008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:23,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:23,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2021-12-06 18:28:23,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155223842] [2021-12-06 18:28:23,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:23,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:28:23,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:28:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:28:23,597 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:23,779 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-06 18:28:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:28:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:28:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:23,780 INFO L225 Difference]: With dead ends: 49 [2021-12-06 18:28:23,780 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 18:28:23,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:28:23,781 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 178 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:23,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 228 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 18:28:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-12-06 18:28:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-06 18:28:23,783 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2021-12-06 18:28:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:23,783 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-06 18:28:23,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-06 18:28:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:28:23,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:23,784 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:23,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:28:23,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:28:23,984 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2021-12-06 18:28:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:23,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617158146] [2021-12-06 18:28:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:23,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:24,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617158146] [2021-12-06 18:28:24,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617158146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:24,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:24,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:28:24,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900307641] [2021-12-06 18:28:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:24,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:28:24,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:28:24,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:28:24,068 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:28:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:24,147 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-06 18:28:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:28:24,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-06 18:28:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:24,148 INFO L225 Difference]: With dead ends: 65 [2021-12-06 18:28:24,148 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 18:28:24,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:28:24,149 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:24,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 175 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 18:28:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-06 18:28:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 18:28:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-12-06 18:28:24,151 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2021-12-06 18:28:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:24,151 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-12-06 18:28:24,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:28:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-12-06 18:28:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:28:24,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:24,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:24,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:28:24,153 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2021-12-06 18:28:24,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:24,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630893689] [2021-12-06 18:28:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:24,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:24,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630893689] [2021-12-06 18:28:24,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630893689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:24,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:24,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:28:24,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683884864] [2021-12-06 18:28:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:24,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:28:24,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:28:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:28:24,269 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:28:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:24,425 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-12-06 18:28:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:28:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-06 18:28:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:24,426 INFO L225 Difference]: With dead ends: 93 [2021-12-06 18:28:24,426 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 18:28:24,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:28:24,427 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:24,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 174 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 18:28:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-12-06 18:28:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:28:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-06 18:28:24,429 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2021-12-06 18:28:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:24,429 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-06 18:28:24,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:28:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-06 18:28:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:28:24,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:24,430 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:24,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:28:24,430 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2021-12-06 18:28:24,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:24,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673502360] [2021-12-06 18:28:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:24,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:24,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:24,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673502360] [2021-12-06 18:28:24,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673502360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:24,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060947798] [2021-12-06 18:28:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:24,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:24,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:24,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:24,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:28:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:28:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:24,578 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 9 treesize of output 11 [2021-12-06 18:28:24,581 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 18:28:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:24,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:24,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060947798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:24,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:24,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-06 18:28:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026471187] [2021-12-06 18:28:24,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:24,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:28:24,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:24,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:28:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:28:24,913 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 18:28:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:25,198 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-12-06 18:28:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:28:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 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 29 [2021-12-06 18:28:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:25,199 INFO L225 Difference]: With dead ends: 86 [2021-12-06 18:28:25,199 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 18:28:25,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:28:25,200 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 178 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:25,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 340 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 18:28:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-12-06 18:28:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:28:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-12-06 18:28:25,202 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2021-12-06 18:28:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:25,202 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-12-06 18:28:25,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 18:28:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-12-06 18:28:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:28:25,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:25,203 INFO L514 BasicCegarLoop]: trace histogram [3, 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 18:28:25,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:28:25,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:25,404 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:25,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2021-12-06 18:28:25,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:25,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421797722] [2021-12-06 18:28:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:25,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:25,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421797722] [2021-12-06 18:28:25,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421797722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75145678] [2021-12-06 18:28:25,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:25,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:25,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:25,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:25,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:28:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:25,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 18:28:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:25,637 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 14 treesize of output 10 [2021-12-06 18:28:25,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:25,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:25,989 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 18 treesize of output 10 [2021-12-06 18:28:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:25,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:26,135 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 13 [2021-12-06 18:28:26,138 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 26 treesize of output 22 [2021-12-06 18:28:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:26,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75145678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:26,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:26,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2021-12-06 18:28:26,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3111047] [2021-12-06 18:28:26,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:26,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:28:26,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:28:26,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:28:26,286 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:28:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:26,577 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2021-12-06 18:28:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:28:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 18:28:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:26,578 INFO L225 Difference]: With dead ends: 126 [2021-12-06 18:28:26,578 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 18:28:26,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 18:28:26,579 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:26,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 355 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2021-12-06 18:28:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 18:28:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2021-12-06 18:28:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 18:28:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-12-06 18:28:26,582 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 30 [2021-12-06 18:28:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-12-06 18:28:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:28:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-12-06 18:28:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 18:28:26,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:26,583 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:26,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:28:26,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 18:28:26,783 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash -663599108, now seen corresponding path program 3 times [2021-12-06 18:28:26,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:26,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626594687] [2021-12-06 18:28:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:26,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:26,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:26,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626594687] [2021-12-06 18:28:26,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626594687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:26,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357115196] [2021-12-06 18:28:26,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:28:26,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:26,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:26,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:28:26,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:28:26,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:28:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:27,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:27,191 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 18:28:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357115196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:27,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:27,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2021-12-06 18:28:27,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395376035] [2021-12-06 18:28:27,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:28:27,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:28:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:28:27,213 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 18:28:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:27,468 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-12-06 18:28:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:28:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 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 34 [2021-12-06 18:28:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:27,469 INFO L225 Difference]: With dead ends: 151 [2021-12-06 18:28:27,469 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 18:28:27,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:28:27,470 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 231 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:27,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 306 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 18:28:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2021-12-06 18:28:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 130 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 18:28:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2021-12-06 18:28:27,475 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 34 [2021-12-06 18:28:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:27,475 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2021-12-06 18:28:27,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 18:28:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2021-12-06 18:28:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:28:27,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:27,476 INFO L514 BasicCegarLoop]: trace histogram [3, 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 18:28:27,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:28:27,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:27,678 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2021-12-06 18:28:27,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158871208] [2021-12-06 18:28:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:27,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:27,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:27,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158871208] [2021-12-06 18:28:27,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158871208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:27,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738810811] [2021-12-06 18:28:27,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:27,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:27,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:27,875 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:27,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:28:27,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:27,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 18:28:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:27,934 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 18:28:28,054 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 14 treesize of output 10 [2021-12-06 18:28:28,090 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 17 treesize of output 19 [2021-12-06 18:28:28,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:28,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:28,388 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 18 treesize of output 10 [2021-12-06 18:28:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:28,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:28,536 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_294 (Array Int Int)) (|v_ULTIMATE.start_cstrspn_#t~post2#1.offset_23| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_294) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrspn_#t~post2#1.offset_23| 1)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_#t~post2#1.offset_23|) (< |v_ULTIMATE.start_cstrspn_#t~post2#1.offset_23| 0))) is different from false [2021-12-06 18:28:28,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:28,543 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 23 treesize of output 24 [2021-12-06 18:28:28,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:28,548 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 37 treesize of output 37 [2021-12-06 18:28:28,552 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 11 treesize of output 7 [2021-12-06 18:28:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:28,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738810811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:28,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:28,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2021-12-06 18:28:28,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426048199] [2021-12-06 18:28:28,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:28,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:28:28,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:28:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=891, Unknown=1, NotChecked=60, Total=1056 [2021-12-06 18:28:28,836 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:28:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:29,079 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2021-12-06 18:28:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:28:29,080 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 18:28:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:29,081 INFO L225 Difference]: With dead ends: 220 [2021-12-06 18:28:29,081 INFO L226 Difference]: Without dead ends: 220 [2021-12-06 18:28:29,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=1388, Unknown=1, NotChecked=76, Total=1640 [2021-12-06 18:28:29,083 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 111 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:29,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 573 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-12-06 18:28:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-06 18:28:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 182. [2021-12-06 18:28:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.15) internal successors, (207), 181 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 18:28:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2021-12-06 18:28:29,089 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 37 [2021-12-06 18:28:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:29,090 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2021-12-06 18:28:29,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:28:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2021-12-06 18:28:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 18:28:29,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:29,091 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:29,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:28:29,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:28:29,291 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:29,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 4 times [2021-12-06 18:28:29,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:29,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661624905] [2021-12-06 18:28:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:29,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:29,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661624905] [2021-12-06 18:28:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661624905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530827638] [2021-12-06 18:28:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:28:29,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:29,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:29,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:28:29,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:28:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 18:28:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:29,475 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:28:29,475 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:28:29,578 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 18:28:29,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:29,845 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 17 treesize of output 7 [2021-12-06 18:28:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:29,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:30,111 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 13 treesize of output 11 [2021-12-06 18:28:30,114 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 18:28:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:30,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530827638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:30,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:30,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2021-12-06 18:28:30,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70950783] [2021-12-06 18:28:30,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:30,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:28:30,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:28:30,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:28:30,367 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 18:28:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:30,798 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2021-12-06 18:28:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:28:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-06 18:28:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:30,800 INFO L225 Difference]: With dead ends: 271 [2021-12-06 18:28:30,800 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 18:28:30,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=354, Invalid=3068, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:28:30,802 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 110 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:30,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 594 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 280 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2021-12-06 18:28:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 18:28:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 226. [2021-12-06 18:28:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 225 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2021-12-06 18:28:30,808 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 39 [2021-12-06 18:28:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:30,808 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2021-12-06 18:28:30,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 18:28:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2021-12-06 18:28:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:28:30,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:30,808 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:28:30,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:28:31,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:28:31,010 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:31,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2021-12-06 18:28:31,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413755113] [2021-12-06 18:28:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:31,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:31,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413755113] [2021-12-06 18:28:31,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413755113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625554987] [2021-12-06 18:28:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:28:31,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:31,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:31,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:31,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:28:31,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:28:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:28:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:31,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 18:28:31,224 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 10 treesize of output 8 [2021-12-06 18:28:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:31,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:31,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625554987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:31,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:31,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-12-06 18:28:31,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049529444] [2021-12-06 18:28:31,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:31,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:28:31,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:28:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:28:31,664 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 27 states, 26 states have (on average 4.423076923076923) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 18:28:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:32,047 INFO L93 Difference]: Finished difference Result 287 states and 320 transitions. [2021-12-06 18:28:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:28:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.423076923076923) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 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 41 [2021-12-06 18:28:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:32,049 INFO L225 Difference]: With dead ends: 287 [2021-12-06 18:28:32,049 INFO L226 Difference]: Without dead ends: 287 [2021-12-06 18:28:32,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:28:32,050 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 255 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:32,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 564 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:28:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-06 18:28:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 261. [2021-12-06 18:28:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 259 states have (on average 1.1467181467181466) internal successors, (297), 260 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 18:28:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 297 transitions. [2021-12-06 18:28:32,055 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 297 transitions. Word has length 41 [2021-12-06 18:28:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:32,055 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 297 transitions. [2021-12-06 18:28:32,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.423076923076923) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 18:28:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 297 transitions. [2021-12-06 18:28:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 18:28:32,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:32,056 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:32,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:28:32,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:28:32,257 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:32,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:32,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2021-12-06 18:28:32,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:32,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812254982] [2021-12-06 18:28:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:32,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:32,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:32,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812254982] [2021-12-06 18:28:32,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812254982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:32,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851432210] [2021-12-06 18:28:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:32,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:32,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:32,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:28:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 18:28:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:32,534 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 14 treesize of output 10 [2021-12-06 18:28:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:32,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:32,938 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 18 treesize of output 10 [2021-12-06 18:28:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:32,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:33,103 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 15 treesize of output 13 [2021-12-06 18:28:33,105 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 26 treesize of output 22 [2021-12-06 18:28:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:33,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851432210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:33,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:33,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2021-12-06 18:28:33,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323028765] [2021-12-06 18:28:33,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:33,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:28:33,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:33,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:28:33,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:28:33,235 INFO L87 Difference]: Start difference. First operand 261 states and 297 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:28:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:33,542 INFO L93 Difference]: Finished difference Result 265 states and 293 transitions. [2021-12-06 18:28:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:28:33,542 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 18:28:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:33,543 INFO L225 Difference]: With dead ends: 265 [2021-12-06 18:28:33,544 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 18:28:33,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 18:28:33,545 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 138 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:33,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 351 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 175 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2021-12-06 18:28:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 18:28:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-12-06 18:28:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.1341991341991342) internal successors, (262), 232 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 262 transitions. [2021-12-06 18:28:33,549 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 262 transitions. Word has length 42 [2021-12-06 18:28:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:33,549 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 262 transitions. [2021-12-06 18:28:33,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:28:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 262 transitions. [2021-12-06 18:28:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:28:33,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:33,550 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:33,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:33,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:28:33,752 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:33,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 5 times [2021-12-06 18:28:33,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795671215] [2021-12-06 18:28:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:33,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:33,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:33,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795671215] [2021-12-06 18:28:33,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795671215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:33,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217915878] [2021-12-06 18:28:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:28:33,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:33,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:33,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:28:33,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:28:33,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:33,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 18:28:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:33,950 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:28:33,951 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:28:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:34,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217915878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:34,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:34,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2021-12-06 18:28:34,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699436403] [2021-12-06 18:28:34,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:34,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:28:34,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:28:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:28:34,372 INFO L87 Difference]: Start difference. First operand 233 states and 262 transitions. Second operand has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 34 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:28:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:34,803 INFO L93 Difference]: Finished difference Result 369 states and 409 transitions. [2021-12-06 18:28:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:28:34,803 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 34 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 18:28:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:34,805 INFO L225 Difference]: With dead ends: 369 [2021-12-06 18:28:34,805 INFO L226 Difference]: Without dead ends: 369 [2021-12-06 18:28:34,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1889, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:28:34,806 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 331 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:34,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 425 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:28:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-06 18:28:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 303. [2021-12-06 18:28:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 301 states have (on average 1.1461794019933556) internal successors, (345), 302 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 18:28:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 345 transitions. [2021-12-06 18:28:34,814 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 345 transitions. Word has length 43 [2021-12-06 18:28:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:34,814 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 345 transitions. [2021-12-06 18:28:34,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 34 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:28:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 345 transitions. [2021-12-06 18:28:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 18:28:34,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:34,815 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:34,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:28:35,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 18:28:35,017 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:35,018 INFO L85 PathProgramCache]: Analyzing trace with hash -24196359, now seen corresponding path program 6 times [2021-12-06 18:28:35,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:35,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500404229] [2021-12-06 18:28:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:35,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:35,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500404229] [2021-12-06 18:28:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500404229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127743248] [2021-12-06 18:28:35,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:28:35,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:35,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:35,206 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:35,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:28:35,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:28:35,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:28:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:35,280 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:28:35,280 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:28:35,411 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 14 treesize of output 10 [2021-12-06 18:28:35,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:35,923 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 18 treesize of output 7 [2021-12-06 18:28:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:35,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:36,186 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 13 treesize of output 11 [2021-12-06 18:28:36,188 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 18:28:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:36,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127743248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:36,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:36,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 45 [2021-12-06 18:28:36,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666252129] [2021-12-06 18:28:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:36,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:28:36,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:28:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:28:36,465 INFO L87 Difference]: Start difference. First operand 303 states and 345 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 18:28:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:37,152 INFO L93 Difference]: Finished difference Result 417 states and 465 transitions. [2021-12-06 18:28:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:28:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 18:28:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:37,154 INFO L225 Difference]: With dead ends: 417 [2021-12-06 18:28:37,154 INFO L226 Difference]: Without dead ends: 384 [2021-12-06 18:28:37,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=467, Invalid=4089, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:28:37,155 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 170 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:37,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 736 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 458 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2021-12-06 18:28:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-06 18:28:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 357. [2021-12-06 18:28:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 355 states have (on average 1.1408450704225352) internal successors, (405), 356 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 18:28:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 405 transitions. [2021-12-06 18:28:37,162 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 405 transitions. Word has length 48 [2021-12-06 18:28:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:37,162 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 405 transitions. [2021-12-06 18:28:37,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 18:28:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 405 transitions. [2021-12-06 18:28:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:28:37,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:37,163 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:37,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:28:37,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:28:37,364 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2021-12-06 18:28:37,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115673201] [2021-12-06 18:28:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:37,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:37,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115673201] [2021-12-06 18:28:37,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115673201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563094455] [2021-12-06 18:28:37,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:28:37,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:37,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:37,842 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:37,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:28:37,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:28:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:28:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:37,917 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:28:37,917 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:28:37,925 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 18:28:38,085 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 18:28:38,122 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 18:28:38,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:38,415 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 17 treesize of output 7 [2021-12-06 18:28:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:38,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:38,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:38,858 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 21 treesize of output 22 [2021-12-06 18:28:38,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:38,862 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 33 treesize of output 33 [2021-12-06 18:28:38,865 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 18:28:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:39,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563094455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:39,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:39,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2021-12-06 18:28:39,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821313667] [2021-12-06 18:28:39,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:39,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:28:39,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:28:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2566, Unknown=26, NotChecked=0, Total=2756 [2021-12-06 18:28:39,220 INFO L87 Difference]: Start difference. First operand 357 states and 405 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 18:28:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:40,595 INFO L93 Difference]: Finished difference Result 594 states and 672 transitions. [2021-12-06 18:28:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:28:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-06 18:28:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:40,598 INFO L225 Difference]: With dead ends: 594 [2021-12-06 18:28:40,598 INFO L226 Difference]: Without dead ends: 567 [2021-12-06 18:28:40,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=649, Invalid=7697, Unknown=26, NotChecked=0, Total=8372 [2021-12-06 18:28:40,601 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 179 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:40,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1138 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 671 Invalid, 0 Unknown, 525 Unchecked, 0.2s Time] [2021-12-06 18:28:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-12-06 18:28:40,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 538. [2021-12-06 18:28:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 536 states have (on average 1.1492537313432836) internal successors, (616), 537 states have internal predecessors, (616), 0 states have call successors, (0), 0 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 18:28:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 616 transitions. [2021-12-06 18:28:40,609 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 616 transitions. Word has length 49 [2021-12-06 18:28:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:40,610 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 616 transitions. [2021-12-06 18:28:40,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 18:28:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 616 transitions. [2021-12-06 18:28:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:28:40,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:40,610 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:40,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:28:40,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:40,811 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash -839474363, now seen corresponding path program 2 times [2021-12-06 18:28:40,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:40,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647831409] [2021-12-06 18:28:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:40,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:28:41,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647831409] [2021-12-06 18:28:41,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647831409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48021404] [2021-12-06 18:28:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:41,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:41,027 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:41,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:28:41,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:41,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:41,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 18:28:41,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:41,154 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 14 treesize of output 10 [2021-12-06 18:28:41,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:41,702 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 20 treesize of output 20 [2021-12-06 18:28:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:41,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:42,301 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 13 [2021-12-06 18:28:42,303 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 18:28:42,305 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 26 treesize of output 22 [2021-12-06 18:28:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:42,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48021404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:42,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:42,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 45 [2021-12-06 18:28:42,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123590551] [2021-12-06 18:28:42,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:42,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:28:42,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:28:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1831, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:28:42,330 INFO L87 Difference]: Start difference. First operand 538 states and 616 transitions. Second operand has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:43,928 INFO L93 Difference]: Finished difference Result 592 states and 663 transitions. [2021-12-06 18:28:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:28:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 18:28:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:43,931 INFO L225 Difference]: With dead ends: 592 [2021-12-06 18:28:43,931 INFO L226 Difference]: Without dead ends: 541 [2021-12-06 18:28:43,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=708, Invalid=7664, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 18:28:43,933 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 226 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:43,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 725 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 612 Invalid, 0 Unknown, 270 Unchecked, 0.2s Time] [2021-12-06 18:28:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-06 18:28:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 491. [2021-12-06 18:28:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 489 states have (on average 1.1349693251533743) internal successors, (555), 490 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 18:28:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 555 transitions. [2021-12-06 18:28:43,941 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 555 transitions. Word has length 51 [2021-12-06 18:28:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:43,941 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 555 transitions. [2021-12-06 18:28:43,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 555 transitions. [2021-12-06 18:28:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:28:43,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:43,942 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:43,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:28:44,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 18:28:44,144 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2015974442, now seen corresponding path program 7 times [2021-12-06 18:28:44,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:44,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607141323] [2021-12-06 18:28:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:44,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:44,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607141323] [2021-12-06 18:28:44,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607141323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121664218] [2021-12-06 18:28:44,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:28:44,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:44,311 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:44,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:28:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:28:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:44,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:44,716 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 18:28:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:44,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121664218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:44,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:44,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-06 18:28:44,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760392831] [2021-12-06 18:28:44,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:28:44,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:44,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:28:44,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:28:44,744 INFO L87 Difference]: Start difference. First operand 491 states and 555 transitions. Second operand has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:28:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:45,366 INFO L93 Difference]: Finished difference Result 758 states and 850 transitions. [2021-12-06 18:28:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:28:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 18:28:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:45,369 INFO L225 Difference]: With dead ends: 758 [2021-12-06 18:28:45,369 INFO L226 Difference]: Without dead ends: 758 [2021-12-06 18:28:45,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:28:45,370 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 547 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:45,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 518 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:28:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-12-06 18:28:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 638. [2021-12-06 18:28:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 636 states have (on average 1.1477987421383649) internal successors, (730), 637 states have internal predecessors, (730), 0 states have call successors, (0), 0 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 18:28:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 730 transitions. [2021-12-06 18:28:45,379 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 730 transitions. Word has length 52 [2021-12-06 18:28:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:45,380 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 730 transitions. [2021-12-06 18:28:45,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:28:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 730 transitions. [2021-12-06 18:28:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 18:28:45,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:45,381 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-12-06 18:28:45,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:28:45,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 18:28:45,582 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2021-12-06 18:28:45,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150497766] [2021-12-06 18:28:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:45,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:45,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:45,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150497766] [2021-12-06 18:28:45,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150497766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:45,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454407519] [2021-12-06 18:28:45,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:28:45,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:45,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:45,730 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:45,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:28:45,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:28:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:28:45,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:45,820 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 9 treesize of output 11 [2021-12-06 18:28:45,822 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 18:28:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:46,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:46,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454407519] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:46,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:46,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2021-12-06 18:28:46,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545881456] [2021-12-06 18:28:46,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:46,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:28:46,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:46,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:28:46,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:28:46,340 INFO L87 Difference]: Start difference. First operand 638 states and 730 transitions. Second operand has 33 states, 32 states have (on average 4.71875) internal successors, (151), 33 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:28:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:46,991 INFO L93 Difference]: Finished difference Result 755 states and 853 transitions. [2021-12-06 18:28:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:28:46,991 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.71875) internal successors, (151), 33 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 18:28:46,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:46,995 INFO L225 Difference]: With dead ends: 755 [2021-12-06 18:28:46,995 INFO L226 Difference]: Without dead ends: 755 [2021-12-06 18:28:46,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=446, Invalid=2104, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:28:46,996 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 355 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:46,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 984 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:28:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-06 18:28:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 714. [2021-12-06 18:28:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 712 states have (on average 1.148876404494382) internal successors, (818), 713 states have internal predecessors, (818), 0 states have call successors, (0), 0 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 18:28:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 818 transitions. [2021-12-06 18:28:47,005 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 818 transitions. Word has length 53 [2021-12-06 18:28:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:47,005 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 818 transitions. [2021-12-06 18:28:47,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.71875) internal successors, (151), 33 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:28:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 818 transitions. [2021-12-06 18:28:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 18:28:47,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:47,006 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:47,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:47,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:47,207 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 8 times [2021-12-06 18:28:47,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:47,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509397133] [2021-12-06 18:28:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:47,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:47,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:47,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509397133] [2021-12-06 18:28:47,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509397133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:47,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563642708] [2021-12-06 18:28:47,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:47,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:47,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:47,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:47,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:28:47,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:47,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 18:28:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:47,555 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 14 treesize of output 10 [2021-12-06 18:28:47,674 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 18:28:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:47,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:47,749 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 13 [2021-12-06 18:28:47,750 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 26 treesize of output 22 [2021-12-06 18:28:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:47,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563642708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:47,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:47,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2021-12-06 18:28:47,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321032196] [2021-12-06 18:28:47,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:47,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 18:28:47,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 18:28:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:28:47,831 INFO L87 Difference]: Start difference. First operand 714 states and 818 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 18:28:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:48,358 INFO L93 Difference]: Finished difference Result 1099 states and 1229 transitions. [2021-12-06 18:28:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:28:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 57 [2021-12-06 18:28:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:48,361 INFO L225 Difference]: With dead ends: 1099 [2021-12-06 18:28:48,361 INFO L226 Difference]: Without dead ends: 998 [2021-12-06 18:28:48,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:28:48,362 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 352 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:48,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 1133 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 972 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2021-12-06 18:28:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-06 18:28:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 901. [2021-12-06 18:28:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 899 states have (on average 1.1446051167964404) internal successors, (1029), 900 states have internal predecessors, (1029), 0 states have call successors, (0), 0 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 18:28:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1029 transitions. [2021-12-06 18:28:48,374 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1029 transitions. Word has length 57 [2021-12-06 18:28:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:48,374 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1029 transitions. [2021-12-06 18:28:48,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 18:28:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1029 transitions. [2021-12-06 18:28:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 18:28:48,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:48,375 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:28:48,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:28:48,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 18:28:48,576 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1017817884, now seen corresponding path program 1 times [2021-12-06 18:28:48,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:48,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677238840] [2021-12-06 18:28:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:48,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:28:48,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677238840] [2021-12-06 18:28:48,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677238840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532881699] [2021-12-06 18:28:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:48,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:48,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:48,744 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:48,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:28:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:48,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 18:28:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:48,816 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 18:28:48,931 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 14 treesize of output 10 [2021-12-06 18:28:48,958 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 17 treesize of output 19 [2021-12-06 18:28:49,041 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 18:28:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:28:49,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:49,124 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_666) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-06 18:28:49,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:49,131 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 23 treesize of output 24 [2021-12-06 18:28:49,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:49,135 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 37 treesize of output 37 [2021-12-06 18:28:49,137 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 11 treesize of output 7 [2021-12-06 18:28:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:28:49,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532881699] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:49,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:49,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2021-12-06 18:28:49,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490717545] [2021-12-06 18:28:49,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:49,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:28:49,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:49,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:28:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=725, Unknown=1, NotChecked=54, Total=870 [2021-12-06 18:28:49,263 INFO L87 Difference]: Start difference. First operand 901 states and 1029 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:49,633 INFO L93 Difference]: Finished difference Result 934 states and 1043 transitions. [2021-12-06 18:28:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:28:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 18:28:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:49,636 INFO L225 Difference]: With dead ends: 934 [2021-12-06 18:28:49,636 INFO L226 Difference]: Without dead ends: 820 [2021-12-06 18:28:49,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=1764, Unknown=1, NotChecked=86, Total=2070 [2021-12-06 18:28:49,637 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 114 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:49,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1211 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 718 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2021-12-06 18:28:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-12-06 18:28:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 694. [2021-12-06 18:28:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 692 states have (on average 1.143063583815029) internal successors, (791), 693 states have internal predecessors, (791), 0 states have call successors, (0), 0 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 18:28:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 791 transitions. [2021-12-06 18:28:49,646 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 791 transitions. Word has length 58 [2021-12-06 18:28:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:49,646 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 791 transitions. [2021-12-06 18:28:49,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 791 transitions. [2021-12-06 18:28:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 18:28:49,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:49,647 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:49,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:28:49,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:49,848 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash 118455529, now seen corresponding path program 3 times [2021-12-06 18:28:49,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719575816] [2021-12-06 18:28:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:49,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:49,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:49,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719575816] [2021-12-06 18:28:49,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719575816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:49,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764692290] [2021-12-06 18:28:49,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:28:49,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:49,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:49,992 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:49,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:28:50,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 18:28:50,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 18:28:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:50,162 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 14 treesize of output 10 [2021-12-06 18:28:50,315 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 18:28:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:50,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:50,390 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 13 [2021-12-06 18:28:50,392 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 26 treesize of output 22 [2021-12-06 18:28:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:28:50,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764692290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:50,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:50,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-12-06 18:28:50,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268016039] [2021-12-06 18:28:50,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:50,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:28:50,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:28:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:28:50,467 INFO L87 Difference]: Start difference. First operand 694 states and 791 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:28:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:50,889 INFO L93 Difference]: Finished difference Result 740 states and 821 transitions. [2021-12-06 18:28:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:28:50,890 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 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 60 [2021-12-06 18:28:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:50,892 INFO L225 Difference]: With dead ends: 740 [2021-12-06 18:28:50,892 INFO L226 Difference]: Without dead ends: 630 [2021-12-06 18:28:50,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:28:50,893 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 227 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:50,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 935 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 785 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-12-06 18:28:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-12-06 18:28:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 603. [2021-12-06 18:28:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 601 states have (on average 1.1314475873544094) internal successors, (680), 602 states have internal predecessors, (680), 0 states have call successors, (0), 0 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 18:28:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 680 transitions. [2021-12-06 18:28:50,899 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 680 transitions. Word has length 60 [2021-12-06 18:28:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:50,900 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 680 transitions. [2021-12-06 18:28:50,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:28:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 680 transitions. [2021-12-06 18:28:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:28:50,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:50,901 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:50,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:28:51,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:51,102 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 9 times [2021-12-06 18:28:51,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745945913] [2021-12-06 18:28:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:51,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:51,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:51,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745945913] [2021-12-06 18:28:51,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745945913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:51,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562713512] [2021-12-06 18:28:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:28:51,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:51,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:51,277 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:51,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:28:51,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:28:51,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:51,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:28:51,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:51,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:51,845 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 18:28:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:51,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562713512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:51,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:51,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2021-12-06 18:28:51,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785731654] [2021-12-06 18:28:51,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:51,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:28:51,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:28:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:28:51,881 INFO L87 Difference]: Start difference. First operand 603 states and 680 transitions. Second operand has 45 states, 44 states have (on average 3.409090909090909) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 18:28:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:52,596 INFO L93 Difference]: Finished difference Result 746 states and 825 transitions. [2021-12-06 18:28:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:28:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.409090909090909) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 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 61 [2021-12-06 18:28:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:52,599 INFO L225 Difference]: With dead ends: 746 [2021-12-06 18:28:52,599 INFO L226 Difference]: Without dead ends: 746 [2021-12-06 18:28:52,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=3276, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 18:28:52,599 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 477 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:52,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 809 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:28:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-06 18:28:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 638. [2021-12-06 18:28:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 636 states have (on average 1.1336477987421383) internal successors, (721), 637 states have internal predecessors, (721), 0 states have call successors, (0), 0 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 18:28:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 721 transitions. [2021-12-06 18:28:52,610 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 721 transitions. Word has length 61 [2021-12-06 18:28:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:52,610 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 721 transitions. [2021-12-06 18:28:52,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.409090909090909) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 18:28:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 721 transitions. [2021-12-06 18:28:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:28:52,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:52,612 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:52,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:28:52,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:52,813 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2021-12-06 18:28:52,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:52,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506627034] [2021-12-06 18:28:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:52,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:53,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506627034] [2021-12-06 18:28:53,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506627034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977754637] [2021-12-06 18:28:53,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:28:53,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:53,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:53,204 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:53,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:28:53,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:28:53,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 18:28:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:53,307 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:28:53,307 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:28:53,321 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 18:28:53,553 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 14 treesize of output 10 [2021-12-06 18:28:53,597 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 17 treesize of output 19 [2021-12-06 18:28:54,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 9 [2021-12-06 18:28:54,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:54,449 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 32 treesize of output 14 [2021-12-06 18:28:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:54,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:55,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:55,287 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 24 treesize of output 25 [2021-12-06 18:28:55,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:55,291 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 40 treesize of output 40 [2021-12-06 18:28:55,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:55,297 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 30 treesize of output 30 [2021-12-06 18:28:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:55,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977754637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:55,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:55,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 24] total 64 [2021-12-06 18:28:55,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858639446] [2021-12-06 18:28:55,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:55,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 18:28:55,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:55,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 18:28:55,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=3797, Unknown=1, NotChecked=0, Total=4032 [2021-12-06 18:28:55,825 INFO L87 Difference]: Start difference. First operand 638 states and 721 transitions. Second operand has 64 states, 64 states have (on average 2.578125) internal successors, (165), 64 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 18:28:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:57,198 INFO L93 Difference]: Finished difference Result 1339 states and 1502 transitions. [2021-12-06 18:28:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 18:28:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.578125) internal successors, (165), 64 states have internal predecessors, (165), 0 states have call successors, (0), 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 61 [2021-12-06 18:28:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:57,203 INFO L225 Difference]: With dead ends: 1339 [2021-12-06 18:28:57,203 INFO L226 Difference]: Without dead ends: 1304 [2021-12-06 18:28:57,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=695, Invalid=9404, Unknown=1, NotChecked=0, Total=10100 [2021-12-06 18:28:57,204 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 217 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:57,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 1429 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 598 Invalid, 0 Unknown, 230 Unchecked, 0.2s Time] [2021-12-06 18:28:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-12-06 18:28:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1040. [2021-12-06 18:28:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1038 states have (on average 1.1368015414258188) internal successors, (1180), 1039 states have internal predecessors, (1180), 0 states have call successors, (0), 0 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 18:28:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1180 transitions. [2021-12-06 18:28:57,217 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1180 transitions. Word has length 61 [2021-12-06 18:28:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:57,217 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1180 transitions. [2021-12-06 18:28:57,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.578125) internal successors, (165), 64 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 18:28:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1180 transitions. [2021-12-06 18:28:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:28:57,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:57,218 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:57,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:57,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 18:28:57,420 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:57,421 INFO L85 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2021-12-06 18:28:57,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:57,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389018998] [2021-12-06 18:28:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:57,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:57,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:57,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389018998] [2021-12-06 18:28:57,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389018998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:57,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965142231] [2021-12-06 18:28:57,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:28:57,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:57,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:57,593 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:57,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:28:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 18:28:57,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:57,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:57,689 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 9 treesize of output 11 [2021-12-06 18:28:57,692 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 18:28:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:58,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:58,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965142231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:58,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:58,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-06 18:28:58,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315243366] [2021-12-06 18:28:58,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:58,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 18:28:58,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 18:28:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 18:28:58,362 INFO L87 Difference]: Start difference. First operand 1040 states and 1180 transitions. Second operand has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 18:28:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:59,105 INFO L93 Difference]: Finished difference Result 1256 states and 1409 transitions. [2021-12-06 18:28:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:28:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 states have internal predecessors, (187), 0 states have call successors, (0), 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 65 [2021-12-06 18:28:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:59,110 INFO L225 Difference]: With dead ends: 1256 [2021-12-06 18:28:59,110 INFO L226 Difference]: Without dead ends: 1256 [2021-12-06 18:28:59,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 18:28:59,111 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 434 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:59,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1073 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:28:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-12-06 18:28:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1137. [2021-12-06 18:28:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1135 states have (on average 1.1365638766519823) internal successors, (1290), 1136 states have internal predecessors, (1290), 0 states have call successors, (0), 0 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 18:28:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1290 transitions. [2021-12-06 18:28:59,131 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1290 transitions. Word has length 65 [2021-12-06 18:28:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:59,131 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1290 transitions. [2021-12-06 18:28:59,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 18:28:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1290 transitions. [2021-12-06 18:28:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:28:59,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:59,133 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:59,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:59,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 18:28:59,335 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:28:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:59,336 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 10 times [2021-12-06 18:28:59,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:59,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103555204] [2021-12-06 18:28:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:59,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:59,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:59,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103555204] [2021-12-06 18:28:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103555204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:59,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361318217] [2021-12-06 18:28:59,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:28:59,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:59,554 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:59,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:28:59,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:28:59,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 18:28:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:59,628 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:28:59,628 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:28:59,826 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 18:29:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:00,240 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 17 treesize of output 7 [2021-12-06 18:29:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 68 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:00,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:00,680 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 13 treesize of output 11 [2021-12-06 18:29:00,682 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 18:29:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 67 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361318217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:01,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 59 [2021-12-06 18:29:01,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416990686] [2021-12-06 18:29:01,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:01,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 18:29:01,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 18:29:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3144, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:29:01,122 INFO L87 Difference]: Start difference. First operand 1137 states and 1290 transitions. Second operand has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 59 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 18:29:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:02,447 INFO L93 Difference]: Finished difference Result 1411 states and 1584 transitions. [2021-12-06 18:29:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:29:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 59 states have internal predecessors, (180), 0 states have call successors, (0), 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 66 [2021-12-06 18:29:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:02,452 INFO L225 Difference]: With dead ends: 1411 [2021-12-06 18:29:02,452 INFO L226 Difference]: Without dead ends: 1360 [2021-12-06 18:29:02,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=841, Invalid=8089, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 18:29:02,453 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 216 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:02,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1209 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 819 Invalid, 0 Unknown, 269 Unchecked, 0.2s Time] [2021-12-06 18:29:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-12-06 18:29:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1281. [2021-12-06 18:29:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1279 states have (on average 1.1368256450351837) internal successors, (1454), 1280 states have internal predecessors, (1454), 0 states have call successors, (0), 0 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 18:29:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1454 transitions. [2021-12-06 18:29:02,467 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1454 transitions. Word has length 66 [2021-12-06 18:29:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:02,467 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1454 transitions. [2021-12-06 18:29:02,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 59 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 18:29:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1454 transitions. [2021-12-06 18:29:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 18:29:02,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:02,468 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:02,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:02,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 18:29:02,670 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash 267889840, now seen corresponding path program 11 times [2021-12-06 18:29:02,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:02,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587991710] [2021-12-06 18:29:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:02,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:02,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:02,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587991710] [2021-12-06 18:29:02,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587991710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759038744] [2021-12-06 18:29:02,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:29:02,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:02,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:02,875 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:02,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:29:02,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 18:29:02,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 18:29:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:02,975 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:02,975 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:29:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:03,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:03,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759038744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:03,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:03,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 49 [2021-12-06 18:29:03,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150759794] [2021-12-06 18:29:03,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:03,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:29:03,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:29:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:29:03,787 INFO L87 Difference]: Start difference. First operand 1281 states and 1454 transitions. Second operand has 50 states, 49 states have (on average 3.877551020408163) internal successors, (190), 50 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 18:29:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:04,635 INFO L93 Difference]: Finished difference Result 1880 states and 2121 transitions. [2021-12-06 18:29:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:29:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.877551020408163) internal successors, (190), 50 states have internal predecessors, (190), 0 states have call successors, (0), 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 70 [2021-12-06 18:29:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:04,641 INFO L225 Difference]: With dead ends: 1880 [2021-12-06 18:29:04,641 INFO L226 Difference]: Without dead ends: 1880 [2021-12-06 18:29:04,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1139, Invalid=4561, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:29:04,642 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 648 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:04,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 805 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:29:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-12-06 18:29:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1628. [2021-12-06 18:29:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1626 states have (on average 1.1494464944649447) internal successors, (1869), 1627 states have internal predecessors, (1869), 0 states have call successors, (0), 0 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 18:29:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 1869 transitions. [2021-12-06 18:29:04,660 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 1869 transitions. Word has length 70 [2021-12-06 18:29:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:04,660 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 1869 transitions. [2021-12-06 18:29:04,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.877551020408163) internal successors, (190), 50 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 18:29:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 1869 transitions. [2021-12-06 18:29:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 18:29:04,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:04,662 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:04,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:29:04,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 18:29:04,863 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1559326514, now seen corresponding path program 2 times [2021-12-06 18:29:04,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:04,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631658149] [2021-12-06 18:29:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:04,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:29:05,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631658149] [2021-12-06 18:29:05,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631658149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568781986] [2021-12-06 18:29:05,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:29:05,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:05,331 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:05,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:29:05,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:29:05,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:05,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 18:29:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:05,415 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 18:29:05,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:29:05,640 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 17 treesize of output 19 [2021-12-06 18:29:05,764 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 18:29:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:29:05,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:05,872 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_951 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_951) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-06 18:29:05,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:05,875 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 23 treesize of output 24 [2021-12-06 18:29:05,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:05,878 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 37 treesize of output 37 [2021-12-06 18:29:05,880 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 11 treesize of output 7 [2021-12-06 18:29:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:29:06,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568781986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:06,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:06,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 39 [2021-12-06 18:29:06,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949240042] [2021-12-06 18:29:06,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:06,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 18:29:06,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 18:29:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1296, Unknown=1, NotChecked=72, Total=1482 [2021-12-06 18:29:06,050 INFO L87 Difference]: Start difference. First operand 1628 states and 1869 transitions. Second operand has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 18:29:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:07,027 INFO L93 Difference]: Finished difference Result 1628 states and 1843 transitions. [2021-12-06 18:29:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:29:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 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 70 [2021-12-06 18:29:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:07,032 INFO L225 Difference]: With dead ends: 1628 [2021-12-06 18:29:07,032 INFO L226 Difference]: Without dead ends: 1403 [2021-12-06 18:29:07,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=3113, Unknown=1, NotChecked=114, Total=3540 [2021-12-06 18:29:07,033 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 189 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:07,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1273 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1098 Invalid, 0 Unknown, 125 Unchecked, 0.4s Time] [2021-12-06 18:29:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-12-06 18:29:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1203. [2021-12-06 18:29:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1201 states have (on average 1.148209825145712) internal successors, (1379), 1202 states have internal predecessors, (1379), 0 states have call successors, (0), 0 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 18:29:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1379 transitions. [2021-12-06 18:29:07,046 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1379 transitions. Word has length 70 [2021-12-06 18:29:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:07,046 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1379 transitions. [2021-12-06 18:29:07,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 18:29:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1379 transitions. [2021-12-06 18:29:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:29:07,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:07,047 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:07,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 18:29:07,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:07,249 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 8 times [2021-12-06 18:29:07,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:07,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944518174] [2021-12-06 18:29:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:07,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:07,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:07,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944518174] [2021-12-06 18:29:07,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944518174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:07,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501179282] [2021-12-06 18:29:07,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:29:07,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:07,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:07,617 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:07,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 18:29:07,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:29:07,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:29:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:07,705 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 18:29:07,876 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 14 treesize of output 10 [2021-12-06 18:29:07,910 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 17 treesize of output 19 [2021-12-06 18:29:08,080 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 18:29:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:08,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:08,214 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_993 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_993) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-06 18:29:08,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:08,218 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 18:29:08,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:08,221 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 37 treesize of output 37 [2021-12-06 18:29:08,223 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 11 treesize of output 7 [2021-12-06 18:29:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:08,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501179282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:08,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:08,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 20] total 48 [2021-12-06 18:29:08,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872452414] [2021-12-06 18:29:08,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:08,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 18:29:08,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 18:29:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2033, Unknown=1, NotChecked=90, Total=2256 [2021-12-06 18:29:08,390 INFO L87 Difference]: Start difference. First operand 1203 states and 1379 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 18:29:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:09,776 INFO L93 Difference]: Finished difference Result 2236 states and 2523 transitions. [2021-12-06 18:29:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 18:29:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 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 73 [2021-12-06 18:29:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:09,783 INFO L225 Difference]: With dead ends: 2236 [2021-12-06 18:29:09,783 INFO L226 Difference]: Without dead ends: 1911 [2021-12-06 18:29:09,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=642, Invalid=6003, Unknown=1, NotChecked=160, Total=6806 [2021-12-06 18:29:09,783 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 563 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2528 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:09,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 2528 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2213 Invalid, 0 Unknown, 173 Unchecked, 0.6s Time] [2021-12-06 18:29:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-06 18:29:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1342. [2021-12-06 18:29:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1340 states have (on average 1.1492537313432836) internal successors, (1540), 1341 states have internal predecessors, (1540), 0 states have call successors, (0), 0 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 18:29:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1540 transitions. [2021-12-06 18:29:09,800 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1540 transitions. Word has length 73 [2021-12-06 18:29:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:09,800 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1540 transitions. [2021-12-06 18:29:09,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 18:29:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1540 transitions. [2021-12-06 18:29:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 18:29:09,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:09,802 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:09,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:10,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:10,003 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 12 times [2021-12-06 18:29:10,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815489971] [2021-12-06 18:29:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:10,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:10,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:10,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815489971] [2021-12-06 18:29:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815489971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:10,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924901684] [2021-12-06 18:29:10,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:29:10,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:10,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:10,230 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:10,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 18:29:10,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:29:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:10,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 18:29:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:10,467 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 14 treesize of output 10 [2021-12-06 18:29:10,615 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 18:29:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:10,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:10,708 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 13 [2021-12-06 18:29:10,710 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 26 treesize of output 22 [2021-12-06 18:29:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:10,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924901684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:10,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:10,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 42 [2021-12-06 18:29:10,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608369002] [2021-12-06 18:29:10,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:10,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:29:10,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:29:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 18:29:10,811 INFO L87 Difference]: Start difference. First operand 1342 states and 1540 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:11,729 INFO L93 Difference]: Finished difference Result 1960 states and 2203 transitions. [2021-12-06 18:29:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:29:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 18:29:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:11,734 INFO L225 Difference]: With dead ends: 1960 [2021-12-06 18:29:11,734 INFO L226 Difference]: Without dead ends: 1668 [2021-12-06 18:29:11,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=453, Invalid=3453, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:29:11,735 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 493 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:11,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 2267 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:29:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-12-06 18:29:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1536. [2021-12-06 18:29:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1534 states have (on average 1.1479791395045633) internal successors, (1761), 1535 states have internal predecessors, (1761), 0 states have call successors, (0), 0 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 18:29:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 1761 transitions. [2021-12-06 18:29:11,754 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 1761 transitions. Word has length 75 [2021-12-06 18:29:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:11,754 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 1761 transitions. [2021-12-06 18:29:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 1761 transitions. [2021-12-06 18:29:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 18:29:11,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:11,756 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:11,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 18:29:11,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 18:29:11,956 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 9 times [2021-12-06 18:29:11,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:11,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59893604] [2021-12-06 18:29:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:11,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:12,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:12,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59893604] [2021-12-06 18:29:12,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59893604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:12,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137895818] [2021-12-06 18:29:12,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:29:12,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:12,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:12,097 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:12,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 18:29:12,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:29:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 18:29:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:12,228 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 9 treesize of output 11 [2021-12-06 18:29:12,230 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 18:29:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:12,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:13,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137895818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:13,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:13,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2021-12-06 18:29:13,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896107017] [2021-12-06 18:29:13,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:13,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:29:13,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:13,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:29:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:29:13,003 INFO L87 Difference]: Start difference. First operand 1536 states and 1761 transitions. Second operand has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:13,962 INFO L93 Difference]: Finished difference Result 2237 states and 2551 transitions. [2021-12-06 18:29:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:29:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 18:29:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:13,969 INFO L225 Difference]: With dead ends: 2237 [2021-12-06 18:29:13,969 INFO L226 Difference]: Without dead ends: 2237 [2021-12-06 18:29:13,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 18:29:13,970 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 595 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:13,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 931 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:29:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-12-06 18:29:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1706. [2021-12-06 18:29:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1704 states have (on average 1.1484741784037558) internal successors, (1957), 1705 states have internal predecessors, (1957), 0 states have call successors, (0), 0 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 18:29:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 1957 transitions. [2021-12-06 18:29:13,988 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 1957 transitions. Word has length 77 [2021-12-06 18:29:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:13,989 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 1957 transitions. [2021-12-06 18:29:13,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 1957 transitions. [2021-12-06 18:29:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 18:29:13,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:13,990 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:14,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 18:29:14,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:14,191 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 791104003, now seen corresponding path program 4 times [2021-12-06 18:29:14,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:14,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709632571] [2021-12-06 18:29:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:14,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:29:14,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:14,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709632571] [2021-12-06 18:29:14,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709632571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:14,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573868412] [2021-12-06 18:29:14,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:29:14,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:14,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:14,414 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 18:29:14,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:29:14,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 18:29:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:14,501 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:14,501 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:29:14,713 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 18:29:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:15,416 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 17 treesize of output 7 [2021-12-06 18:29:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 71 proven. 93 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:29:15,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:15,886 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 13 treesize of output 11 [2021-12-06 18:29:15,888 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 18:29:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 70 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:29:16,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573868412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:16,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:16,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 59 [2021-12-06 18:29:16,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981713790] [2021-12-06 18:29:16,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 18:29:16,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 18:29:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3144, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:29:16,364 INFO L87 Difference]: Start difference. First operand 1706 states and 1957 transitions. Second operand has 59 states, 59 states have (on average 3.559322033898305) internal successors, (210), 59 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 18:29:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:17,605 INFO L93 Difference]: Finished difference Result 1863 states and 2099 transitions. [2021-12-06 18:29:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:29:17,605 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.559322033898305) internal successors, (210), 59 states have internal predecessors, (210), 0 states have call successors, (0), 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 78 [2021-12-06 18:29:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:17,610 INFO L225 Difference]: With dead ends: 1863 [2021-12-06 18:29:17,610 INFO L226 Difference]: Without dead ends: 1559 [2021-12-06 18:29:17,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1051, Invalid=9049, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 18:29:17,611 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 198 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:17,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1014 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 712 Invalid, 0 Unknown, 373 Unchecked, 0.2s Time] [2021-12-06 18:29:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-12-06 18:29:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1439. [2021-12-06 18:29:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1437 states have (on average 1.1370911621433542) internal successors, (1634), 1438 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 18:29:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1634 transitions. [2021-12-06 18:29:17,627 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1634 transitions. Word has length 78 [2021-12-06 18:29:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:17,627 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1634 transitions. [2021-12-06 18:29:17,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.559322033898305) internal successors, (210), 59 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 18:29:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1634 transitions. [2021-12-06 18:29:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:29:17,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:17,628 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:17,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 18:29:17,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 18:29:17,829 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1372924284, now seen corresponding path program 13 times [2021-12-06 18:29:17,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:17,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220198893] [2021-12-06 18:29:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:17,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:18,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220198893] [2021-12-06 18:29:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220198893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603753308] [2021-12-06 18:29:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:29:18,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:18,092 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:18,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 18:29:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 18:29:18,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:18,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:18,829 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 5 treesize of output 3 [2021-12-06 18:29:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603753308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:18,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:18,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 46 [2021-12-06 18:29:18,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445705911] [2021-12-06 18:29:18,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:18,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 18:29:18,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 18:29:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1937, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 18:29:18,874 INFO L87 Difference]: Start difference. First operand 1439 states and 1634 transitions. Second operand has 47 states, 46 states have (on average 3.5) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:19,906 INFO L93 Difference]: Finished difference Result 1732 states and 1931 transitions. [2021-12-06 18:29:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:29:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.5) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 18:29:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:19,912 INFO L225 Difference]: With dead ends: 1732 [2021-12-06 18:29:19,912 INFO L226 Difference]: Without dead ends: 1732 [2021-12-06 18:29:19,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=964, Invalid=4148, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:29:19,913 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 506 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:19,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1536 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:29:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-12-06 18:29:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1494. [2021-12-06 18:29:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1492 states have (on average 1.138739946380697) internal successors, (1699), 1493 states have internal predecessors, (1699), 0 states have call successors, (0), 0 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 18:29:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1699 transitions. [2021-12-06 18:29:19,926 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1699 transitions. Word has length 79 [2021-12-06 18:29:19,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:19,926 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 1699 transitions. [2021-12-06 18:29:19,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.5) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1699 transitions. [2021-12-06 18:29:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 18:29:19,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:19,927 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:19,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:20,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 18:29:20,129 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1425198035, now seen corresponding path program 14 times [2021-12-06 18:29:20,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:20,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223933760] [2021-12-06 18:29:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:20,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:20,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:20,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223933760] [2021-12-06 18:29:20,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223933760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:20,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894495369] [2021-12-06 18:29:20,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:29:20,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:20,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:20,363 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:20,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 18:29:20,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:29:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 18:29:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:20,585 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 14 treesize of output 10 [2021-12-06 18:29:20,735 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 18:29:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:20,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:20,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 13 [2021-12-06 18:29:20,845 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 26 treesize of output 22 [2021-12-06 18:29:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:20,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894495369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:20,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:20,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 45 [2021-12-06 18:29:20,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170026884] [2021-12-06 18:29:20,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:20,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:29:20,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:20,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:29:20,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:29:20,954 INFO L87 Difference]: Start difference. First operand 1494 states and 1699 transitions. Second operand has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 18:29:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:22,102 INFO L93 Difference]: Finished difference Result 2217 states and 2481 transitions. [2021-12-06 18:29:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:29:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 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 84 [2021-12-06 18:29:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:22,108 INFO L225 Difference]: With dead ends: 2217 [2021-12-06 18:29:22,108 INFO L226 Difference]: Without dead ends: 1884 [2021-12-06 18:29:22,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:29:22,109 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 501 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 3063 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:22,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 3063 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2548 Invalid, 0 Unknown, 63 Unchecked, 0.6s Time] [2021-12-06 18:29:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-12-06 18:29:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1751. [2021-12-06 18:29:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1749 states have (on average 1.1400800457404232) internal successors, (1994), 1750 states have internal predecessors, (1994), 0 states have call successors, (0), 0 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 18:29:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 1994 transitions. [2021-12-06 18:29:22,124 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 1994 transitions. Word has length 84 [2021-12-06 18:29:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:22,124 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 1994 transitions. [2021-12-06 18:29:22,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 18:29:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 1994 transitions. [2021-12-06 18:29:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:29:22,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:22,125 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:22,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 18:29:22,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 18:29:22,326 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash 701755736, now seen corresponding path program 10 times [2021-12-06 18:29:22,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:22,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162421541] [2021-12-06 18:29:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:22,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:22,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162421541] [2021-12-06 18:29:22,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162421541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637007581] [2021-12-06 18:29:22,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:29:22,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:22,710 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:22,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:29:22,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:29:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 18:29:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:22,818 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:22,818 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:29:23,419 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 18:29:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:23,473 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 18:29:24,774 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:29:24,774 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 19 [2021-12-06 18:29:25,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:25,057 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 32 treesize of output 14 [2021-12-06 18:29:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 73 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:25,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:26,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:26,358 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 24 treesize of output 25 [2021-12-06 18:29:26,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:26,362 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 40 treesize of output 40 [2021-12-06 18:29:26,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:26,367 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 30 treesize of output 30 [2021-12-06 18:29:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 97 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:27,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637007581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:27,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:27,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33, 34] total 87 [2021-12-06 18:29:27,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512157437] [2021-12-06 18:29:27,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:27,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 18:29:27,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:27,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 18:29:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=7006, Unknown=7, NotChecked=0, Total=7482 [2021-12-06 18:29:27,600 INFO L87 Difference]: Start difference. First operand 1751 states and 1994 transitions. Second operand has 87 states, 87 states have (on average 2.7241379310344827) internal successors, (237), 87 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:33,024 INFO L93 Difference]: Finished difference Result 2312 states and 2607 transitions. [2021-12-06 18:29:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-06 18:29:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.7241379310344827) internal successors, (237), 87 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 18:29:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:33,031 INFO L225 Difference]: With dead ends: 2312 [2021-12-06 18:29:33,032 INFO L226 Difference]: Without dead ends: 2261 [2021-12-06 18:29:33,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7760 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2033, Invalid=29466, Unknown=7, NotChecked=0, Total=31506 [2021-12-06 18:29:33,033 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 377 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:33,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1114 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1557 Invalid, 0 Unknown, 342 Unchecked, 0.5s Time] [2021-12-06 18:29:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-12-06 18:29:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 2146. [2021-12-06 18:29:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2144 states have (on average 1.1343283582089552) internal successors, (2432), 2145 states have internal predecessors, (2432), 0 states have call successors, (0), 0 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 18:29:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 2432 transitions. [2021-12-06 18:29:33,052 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 2432 transitions. Word has length 85 [2021-12-06 18:29:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:33,053 INFO L470 AbstractCegarLoop]: Abstraction has 2146 states and 2432 transitions. [2021-12-06 18:29:33,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.7241379310344827) internal successors, (237), 87 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 2432 transitions. [2021-12-06 18:29:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 18:29:33,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:33,054 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:33,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 18:29:33,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 18:29:33,255 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash 767994506, now seen corresponding path program 15 times [2021-12-06 18:29:33,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:33,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491956606] [2021-12-06 18:29:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:33,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:33,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491956606] [2021-12-06 18:29:33,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491956606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:33,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576628212] [2021-12-06 18:29:33,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:29:33,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:33,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:33,516 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 18:29:33,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:29:33,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:29:33,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:34,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:34,354 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 7 treesize of output 5 [2021-12-06 18:29:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:34,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576628212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:34,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:34,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 59 [2021-12-06 18:29:34,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615863294] [2021-12-06 18:29:34,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:34,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:29:34,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:29:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=3104, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:29:34,396 INFO L87 Difference]: Start difference. First operand 2146 states and 2432 transitions. Second operand has 60 states, 59 states have (on average 3.711864406779661) internal successors, (219), 60 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:35,419 INFO L93 Difference]: Finished difference Result 2470 states and 2759 transitions. [2021-12-06 18:29:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 18:29:35,419 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.711864406779661) internal successors, (219), 60 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-06 18:29:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:35,425 INFO L225 Difference]: With dead ends: 2470 [2021-12-06 18:29:35,425 INFO L226 Difference]: Without dead ends: 2470 [2021-12-06 18:29:35,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1440, Invalid=6216, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 18:29:35,426 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 593 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 1310 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:29:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-12-06 18:29:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2201. [2021-12-06 18:29:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2199 states have (on average 1.1355161437016825) internal successors, (2497), 2200 states have internal predecessors, (2497), 0 states have call successors, (0), 0 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 18:29:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2497 transitions. [2021-12-06 18:29:35,448 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2497 transitions. Word has length 88 [2021-12-06 18:29:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:35,449 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 2497 transitions. [2021-12-06 18:29:35,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.711864406779661) internal successors, (219), 60 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2497 transitions. [2021-12-06 18:29:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 18:29:35,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:35,451 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:35,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 18:29:35,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 18:29:35,652 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash 303608411, now seen corresponding path program 11 times [2021-12-06 18:29:35,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:35,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364480369] [2021-12-06 18:29:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:35,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:35,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364480369] [2021-12-06 18:29:35,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364480369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158640541] [2021-12-06 18:29:35,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:29:35,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:35,867 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 18:29:35,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 18:29:35,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 18:29:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:36,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:36,504 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 21 treesize of output 17 [2021-12-06 18:29:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:36,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158640541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:36,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:36,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2021-12-06 18:29:36,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967397702] [2021-12-06 18:29:36,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:36,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 18:29:36,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:36,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 18:29:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:29:36,711 INFO L87 Difference]: Start difference. First operand 2201 states and 2497 transitions. Second operand has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:37,362 INFO L93 Difference]: Finished difference Result 4109 states and 4673 transitions. [2021-12-06 18:29:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:29:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 18:29:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:37,367 INFO L225 Difference]: With dead ends: 4109 [2021-12-06 18:29:37,367 INFO L226 Difference]: Without dead ends: 4109 [2021-12-06 18:29:37,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=904, Invalid=3518, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:29:37,368 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 599 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:37,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 1589 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:29:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-12-06 18:29:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 2412. [2021-12-06 18:29:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2410 states have (on average 1.1365145228215767) internal successors, (2739), 2411 states have internal predecessors, (2739), 0 states have call successors, (0), 0 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 18:29:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 2739 transitions. [2021-12-06 18:29:37,398 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 2739 transitions. Word has length 89 [2021-12-06 18:29:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:37,398 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 2739 transitions. [2021-12-06 18:29:37,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 2739 transitions. [2021-12-06 18:29:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:29:37,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:37,400 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:37,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 18:29:37,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:37,601 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:37,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2114784281, now seen corresponding path program 16 times [2021-12-06 18:29:37,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:37,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001325065] [2021-12-06 18:29:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:37,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 26 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:37,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001325065] [2021-12-06 18:29:37,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001325065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:37,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645580273] [2021-12-06 18:29:37,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:29:37,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:37,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:37,896 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 18:29:37,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:29:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 18:29:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:37,987 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:37,987 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:29:38,343 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 18:29:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:39,180 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 17 treesize of output 7 [2021-12-06 18:29:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 167 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:39,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:39,833 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 13 treesize of output 11 [2021-12-06 18:29:39,835 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 18:29:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 166 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:40,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645580273] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:40,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:40,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 77 [2021-12-06 18:29:40,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032419543] [2021-12-06 18:29:40,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:40,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 18:29:40,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 18:29:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=5385, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 18:29:40,540 INFO L87 Difference]: Start difference. First operand 2412 states and 2739 transitions. Second operand has 77 states, 77 states have (on average 3.3896103896103895) internal successors, (261), 77 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:42,331 INFO L93 Difference]: Finished difference Result 3096 states and 3486 transitions. [2021-12-06 18:29:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 18:29:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.3896103896103895) internal successors, (261), 77 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 18:29:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:42,335 INFO L225 Difference]: With dead ends: 3096 [2021-12-06 18:29:42,335 INFO L226 Difference]: Without dead ends: 3022 [2021-12-06 18:29:42,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4473 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1528, Invalid=15502, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 18:29:42,336 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 389 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:42,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 1996 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1400 Invalid, 0 Unknown, 304 Unchecked, 0.4s Time] [2021-12-06 18:29:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-12-06 18:29:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2716. [2021-12-06 18:29:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2714 states have (on average 1.138909358879882) internal successors, (3091), 2715 states have internal predecessors, (3091), 0 states have call successors, (0), 0 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 18:29:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3091 transitions. [2021-12-06 18:29:42,366 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3091 transitions. Word has length 93 [2021-12-06 18:29:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:42,366 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3091 transitions. [2021-12-06 18:29:42,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.3896103896103895) internal successors, (261), 77 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3091 transitions. [2021-12-06 18:29:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 18:29:42,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:42,368 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:42,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 18:29:42,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:42,570 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -157062976, now seen corresponding path program 3 times [2021-12-06 18:29:42,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:42,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952248384] [2021-12-06 18:29:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:42,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 17 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:29:43,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:43,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952248384] [2021-12-06 18:29:43,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952248384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:43,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420462067] [2021-12-06 18:29:43,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:29:43,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:43,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:43,183 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 18:29:43,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 18:29:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:43,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 18:29:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:43,323 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 18:29:43,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:29:43,646 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 17 treesize of output 19 [2021-12-06 18:29:43,886 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 18:29:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:29:43,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:44,066 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-06 18:29:44,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:44,069 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 23 treesize of output 24 [2021-12-06 18:29:44,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:44,072 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 37 treesize of output 37 [2021-12-06 18:29:44,074 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 11 treesize of output 7 [2021-12-06 18:29:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:29:44,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420462067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:44,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:44,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 22, 22] total 57 [2021-12-06 18:29:44,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764542753] [2021-12-06 18:29:44,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:44,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 18:29:44,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 18:29:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2946, Unknown=1, NotChecked=108, Total=3192 [2021-12-06 18:29:44,288 INFO L87 Difference]: Start difference. First operand 2716 states and 3091 transitions. Second operand has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 57 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 18:29:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:46,750 INFO L93 Difference]: Finished difference Result 3898 states and 4410 transitions. [2021-12-06 18:29:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:29:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 57 states have internal predecessors, (173), 0 states have call successors, (0), 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 94 [2021-12-06 18:29:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:46,753 INFO L225 Difference]: With dead ends: 3898 [2021-12-06 18:29:46,753 INFO L226 Difference]: Without dead ends: 2716 [2021-12-06 18:29:46,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=462, Invalid=9842, Unknown=2, NotChecked=200, Total=10506 [2021-12-06 18:29:46,754 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 271 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:46,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 3461 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3438 Invalid, 0 Unknown, 295 Unchecked, 1.0s Time] [2021-12-06 18:29:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-12-06 18:29:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 2412. [2021-12-06 18:29:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2410 states have (on average 1.1435684647302904) internal successors, (2756), 2411 states have internal predecessors, (2756), 0 states have call successors, (0), 0 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 18:29:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 2756 transitions. [2021-12-06 18:29:46,772 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 2756 transitions. Word has length 94 [2021-12-06 18:29:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:46,772 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 2756 transitions. [2021-12-06 18:29:46,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 57 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 18:29:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 2756 transitions. [2021-12-06 18:29:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:29:46,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:46,774 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:46,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 18:29:46,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 18:29:46,974 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1741924822, now seen corresponding path program 17 times [2021-12-06 18:29:46,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:46,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706317709] [2021-12-06 18:29:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:46,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:47,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706317709] [2021-12-06 18:29:47,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706317709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671924374] [2021-12-06 18:29:47,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:29:47,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:47,239 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:47,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 18:29:47,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 18:29:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:47,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 18:29:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:47,362 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:47,362 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:29:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:47,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 153 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:48,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671924374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:48,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:48,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 69 [2021-12-06 18:29:48,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588628908] [2021-12-06 18:29:48,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:48,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 18:29:48,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 18:29:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=4252, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 18:29:48,699 INFO L87 Difference]: Start difference. First operand 2412 states and 2756 transitions. Second operand has 70 states, 69 states have (on average 4.043478260869565) internal successors, (279), 70 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 18:29:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:50,095 INFO L93 Difference]: Finished difference Result 3388 states and 3837 transitions. [2021-12-06 18:29:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 18:29:50,095 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 4.043478260869565) internal successors, (279), 70 states have internal predecessors, (279), 0 states have call successors, (0), 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 97 [2021-12-06 18:29:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:50,098 INFO L225 Difference]: With dead ends: 3388 [2021-12-06 18:29:50,098 INFO L226 Difference]: Without dead ends: 3388 [2021-12-06 18:29:50,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2318, Invalid=9238, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 18:29:50,099 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 795 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:50,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 1510 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:29:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2021-12-06 18:29:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 2982. [2021-12-06 18:29:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2980 states have (on average 1.154026845637584) internal successors, (3439), 2981 states have internal predecessors, (3439), 0 states have call successors, (0), 0 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 18:29:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 3439 transitions. [2021-12-06 18:29:50,122 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 3439 transitions. Word has length 97 [2021-12-06 18:29:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:50,123 INFO L470 AbstractCegarLoop]: Abstraction has 2982 states and 3439 transitions. [2021-12-06 18:29:50,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 4.043478260869565) internal successors, (279), 70 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 18:29:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 3439 transitions. [2021-12-06 18:29:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:29:50,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:50,125 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:50,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 18:29:50,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:50,326 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2077401446, now seen corresponding path program 12 times [2021-12-06 18:29:50,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:50,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793941118] [2021-12-06 18:29:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:50,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:50,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:50,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793941118] [2021-12-06 18:29:50,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793941118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:50,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945076482] [2021-12-06 18:29:50,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:29:50,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:50,747 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:50,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 18:29:50,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:29:50,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-06 18:29:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:50,896 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 18:29:51,185 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 14 treesize of output 10 [2021-12-06 18:29:51,231 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 17 treesize of output 19 [2021-12-06 18:29:52,655 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 18:29:52,656 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-06 18:29:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:52,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:53,362 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1577 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1577 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1577) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) .cse0))))) is different from false [2021-12-06 18:29:53,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:53,367 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 26 treesize of output 27 [2021-12-06 18:29:53,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:53,370 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 44 treesize of output 44 [2021-12-06 18:29:53,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:53,374 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 32 treesize of output 32 [2021-12-06 18:29:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 19 proven. 229 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:53,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945076482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:53,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:53,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 32] total 85 [2021-12-06 18:29:53,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078543134] [2021-12-06 18:29:53,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:53,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 18:29:53,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 18:29:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=6673, Unknown=1, NotChecked=164, Total=7140 [2021-12-06 18:29:53,854 INFO L87 Difference]: Start difference. First operand 2982 states and 3439 transitions. Second operand has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:55,707 INFO L93 Difference]: Finished difference Result 5944 states and 6847 transitions. [2021-12-06 18:29:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 18:29:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-06 18:29:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:55,713 INFO L225 Difference]: With dead ends: 5944 [2021-12-06 18:29:55,713 INFO L226 Difference]: Without dead ends: 5885 [2021-12-06 18:29:55,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3234 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=675, Invalid=15584, Unknown=1, NotChecked=252, Total=16512 [2021-12-06 18:29:55,714 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 284 mSDsluCounter, 3342 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 3517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1528 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:55,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 3427 Invalid, 3517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1965 Invalid, 0 Unknown, 1528 Unchecked, 0.5s Time] [2021-12-06 18:29:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-12-06 18:29:55,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5869. [2021-12-06 18:29:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5869 states, 5867 states have (on average 1.1561274927560934) internal successors, (6783), 5868 states have internal predecessors, (6783), 0 states have call successors, (0), 0 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 18:29:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5869 states to 5869 states and 6783 transitions. [2021-12-06 18:29:55,761 INFO L78 Accepts]: Start accepts. Automaton has 5869 states and 6783 transitions. Word has length 97 [2021-12-06 18:29:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:55,761 INFO L470 AbstractCegarLoop]: Abstraction has 5869 states and 6783 transitions. [2021-12-06 18:29:55,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5869 states and 6783 transitions. [2021-12-06 18:29:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 18:29:55,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:55,765 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:55,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 18:29:55,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:55,966 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:29:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1316555287, now seen corresponding path program 13 times [2021-12-06 18:29:55,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:55,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223884941] [2021-12-06 18:29:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:55,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:56,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:56,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223884941] [2021-12-06 18:29:56,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223884941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:56,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32479591] [2021-12-06 18:29:56,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:29:56,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:56,168 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:56,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 18:29:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 18:29:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:56,291 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:56,292 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:29:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:57,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 91 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:58,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32479591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:58,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:58,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 64 [2021-12-06 18:29:58,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955742172] [2021-12-06 18:29:58,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:58,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 18:29:58,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 18:29:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=3794, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 18:29:58,939 INFO L87 Difference]: Start difference. First operand 5869 states and 6783 transitions. Second operand has 65 states, 64 states have (on average 4.609375) internal successors, (295), 65 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 18:30:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:00,169 INFO L93 Difference]: Finished difference Result 6610 states and 7635 transitions. [2021-12-06 18:30:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 18:30:00,170 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.609375) internal successors, (295), 65 states have internal predecessors, (295), 0 states have call successors, (0), 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 101 [2021-12-06 18:30:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:00,176 INFO L225 Difference]: With dead ends: 6610 [2021-12-06 18:30:00,176 INFO L226 Difference]: Without dead ends: 6610 [2021-12-06 18:30:00,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=875, Invalid=9631, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 18:30:00,177 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 90 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:00,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1752 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 434 Invalid, 0 Unknown, 304 Unchecked, 0.1s Time] [2021-12-06 18:30:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2021-12-06 18:30:00,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6135. [2021-12-06 18:30:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6135 states, 6133 states have (on average 1.1562041415294309) internal successors, (7091), 6134 states have internal predecessors, (7091), 0 states have call successors, (0), 0 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 18:30:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 7091 transitions. [2021-12-06 18:30:00,224 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 7091 transitions. Word has length 101 [2021-12-06 18:30:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:00,224 INFO L470 AbstractCegarLoop]: Abstraction has 6135 states and 7091 transitions. [2021-12-06 18:30:00,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.609375) internal successors, (295), 65 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 18:30:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 7091 transitions. [2021-12-06 18:30:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 18:30:00,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:00,227 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:00,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 18:30:00,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 18:30:00,428 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1402500025, now seen corresponding path program 18 times [2021-12-06 18:30:00,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581048181] [2021-12-06 18:30:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:00,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:00,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:00,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581048181] [2021-12-06 18:30:00,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581048181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:00,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754695567] [2021-12-06 18:30:00,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:30:00,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:00,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:00,697 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:00,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 18:30:00,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 18:30:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 18:30:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:01,085 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 14 treesize of output 10 [2021-12-06 18:30:01,280 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 18:30:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:01,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:01,409 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 13 [2021-12-06 18:30:01,410 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 26 treesize of output 22 [2021-12-06 18:30:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:01,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754695567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:01,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:01,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 51 [2021-12-06 18:30:01,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132929035] [2021-12-06 18:30:01,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:01,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:30:01,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:30:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:30:01,550 INFO L87 Difference]: Start difference. First operand 6135 states and 7091 transitions. Second operand has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:02,917 INFO L93 Difference]: Finished difference Result 8057 states and 9292 transitions. [2021-12-06 18:30:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 18:30:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-06 18:30:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:02,922 INFO L225 Difference]: With dead ends: 8057 [2021-12-06 18:30:02,922 INFO L226 Difference]: Without dead ends: 7974 [2021-12-06 18:30:02,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=506, Invalid=5500, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:30:02,923 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 681 mSDsluCounter, 3693 mSDsCounter, 0 mSdLazyCounter, 2941 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 3860 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:02,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 3860 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2941 Invalid, 0 Unknown, 254 Unchecked, 0.7s Time] [2021-12-06 18:30:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7974 states. [2021-12-06 18:30:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7974 to 6524. [2021-12-06 18:30:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6524 states, 6522 states have (on average 1.1565470714504753) internal successors, (7543), 6523 states have internal predecessors, (7543), 0 states have call successors, (0), 0 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 18:30:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6524 states to 6524 states and 7543 transitions. [2021-12-06 18:30:02,979 INFO L78 Accepts]: Start accepts. Automaton has 6524 states and 7543 transitions. Word has length 102 [2021-12-06 18:30:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:02,979 INFO L470 AbstractCegarLoop]: Abstraction has 6524 states and 7543 transitions. [2021-12-06 18:30:02,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 6524 states and 7543 transitions. [2021-12-06 18:30:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 18:30:02,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:02,989 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:03,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 18:30:03,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 18:30:03,191 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1330470007, now seen corresponding path program 5 times [2021-12-06 18:30:03,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248607399] [2021-12-06 18:30:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:03,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:30:03,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248607399] [2021-12-06 18:30:03,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248607399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052545483] [2021-12-06 18:30:03,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:30:03,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:03,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:03,517 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:03,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 18:30:03,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 18:30:03,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 18:30:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:03,667 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:30:03,668 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:30:04,028 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 14 treesize of output 10 [2021-12-06 18:30:04,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:30:04,704 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 17 treesize of output 17 [2021-12-06 18:30:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:30:04,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:05,682 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 13 [2021-12-06 18:30:05,684 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 26 treesize of output 22 [2021-12-06 18:30:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 120 proven. 245 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:30:06,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052545483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:06,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:06,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 81 [2021-12-06 18:30:06,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341778808] [2021-12-06 18:30:06,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:06,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:30:06,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:30:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=6045, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:30:06,399 INFO L87 Difference]: Start difference. First operand 6524 states and 7543 transitions. Second operand has 81 states, 81 states have (on average 3.7160493827160495) internal successors, (301), 81 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:10,126 INFO L93 Difference]: Finished difference Result 7247 states and 8230 transitions. [2021-12-06 18:30:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 18:30:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.7160493827160495) internal successors, (301), 81 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-06 18:30:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:10,130 INFO L225 Difference]: With dead ends: 7247 [2021-12-06 18:30:10,130 INFO L226 Difference]: Without dead ends: 6648 [2021-12-06 18:30:10,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4945 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1590, Invalid=20462, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 18:30:10,131 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 985 mSDsluCounter, 3801 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 3913 SdHoareTripleChecker+Invalid, 3614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:10,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 3913 Invalid, 3614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3221 Invalid, 0 Unknown, 336 Unchecked, 1.0s Time] [2021-12-06 18:30:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6648 states. [2021-12-06 18:30:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6648 to 5979. [2021-12-06 18:30:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5979 states, 5977 states have (on average 1.1494060565501087) internal successors, (6870), 5978 states have internal predecessors, (6870), 0 states have call successors, (0), 0 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 18:30:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5979 states to 5979 states and 6870 transitions. [2021-12-06 18:30:10,177 INFO L78 Accepts]: Start accepts. Automaton has 5979 states and 6870 transitions. Word has length 105 [2021-12-06 18:30:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:10,178 INFO L470 AbstractCegarLoop]: Abstraction has 5979 states and 6870 transitions. [2021-12-06 18:30:10,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.7160493827160495) internal successors, (301), 81 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 5979 states and 6870 transitions. [2021-12-06 18:30:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 18:30:10,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:10,189 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:10,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 18:30:10,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:10,390 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:10,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1831533212, now seen corresponding path program 19 times [2021-12-06 18:30:10,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:10,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157286151] [2021-12-06 18:30:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:10,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:10,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:10,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157286151] [2021-12-06 18:30:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157286151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300047233] [2021-12-06 18:30:10,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:30:10,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:10,769 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:10,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 18:30:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 18:30:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:11,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:11,719 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 5 treesize of output 3 [2021-12-06 18:30:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:11,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300047233] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:11,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:11,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 58 [2021-12-06 18:30:11,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867455384] [2021-12-06 18:30:11,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:11,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 18:30:11,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 18:30:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3065, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:30:11,782 INFO L87 Difference]: Start difference. First operand 5979 states and 6870 transitions. Second operand has 59 states, 58 states have (on average 3.706896551724138) internal successors, (215), 59 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 18:30:13,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:13,199 INFO L93 Difference]: Finished difference Result 8022 states and 9162 transitions. [2021-12-06 18:30:13,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 18:30:13,200 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.706896551724138) internal successors, (215), 59 states have internal predecessors, (215), 0 states have call successors, (0), 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 106 [2021-12-06 18:30:13,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:13,204 INFO L225 Difference]: With dead ends: 8022 [2021-12-06 18:30:13,204 INFO L226 Difference]: Without dead ends: 8022 [2021-12-06 18:30:13,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1612, Invalid=6944, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 18:30:13,205 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 759 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:13,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1816 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2550 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:30:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2021-12-06 18:30:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 7235. [2021-12-06 18:30:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7233 states have (on average 1.15774920503249) internal successors, (8374), 7234 states have internal predecessors, (8374), 0 states have call successors, (0), 0 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 18:30:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 8374 transitions. [2021-12-06 18:30:13,259 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 8374 transitions. Word has length 106 [2021-12-06 18:30:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:13,260 INFO L470 AbstractCegarLoop]: Abstraction has 7235 states and 8374 transitions. [2021-12-06 18:30:13,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.706896551724138) internal successors, (215), 59 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 18:30:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 8374 transitions. [2021-12-06 18:30:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 18:30:13,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:13,263 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:13,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 18:30:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 18:30:13,465 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1106575132, now seen corresponding path program 4 times [2021-12-06 18:30:13,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:13,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850442430] [2021-12-06 18:30:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:13,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 265 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:30:13,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:13,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850442430] [2021-12-06 18:30:13,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850442430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:13,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242372170] [2021-12-06 18:30:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:30:13,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:13,767 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:13,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 18:30:13,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:30:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 18:30:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:13,897 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 18:30:13,901 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 9 treesize of output 11 [2021-12-06 18:30:14,223 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 18:30:14,263 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 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:30:14,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:30:14,902 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 17 treesize of output 7 [2021-12-06 18:30:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 143 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:30:14,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:15,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:30:15,609 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 21 treesize of output 22 [2021-12-06 18:30:15,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:30:15,612 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 33 treesize of output 33 [2021-12-06 18:30:15,615 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 18:30:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:30:16,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242372170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:16,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:16,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 63 [2021-12-06 18:30:16,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705233243] [2021-12-06 18:30:16,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:16,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 18:30:16,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 18:30:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3607, Unknown=1, NotChecked=0, Total=3906 [2021-12-06 18:30:16,337 INFO L87 Difference]: Start difference. First operand 7235 states and 8374 transitions. Second operand has 63 states, 63 states have (on average 4.301587301587301) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 18:30:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:17,816 INFO L93 Difference]: Finished difference Result 9012 states and 10352 transitions. [2021-12-06 18:30:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 18:30:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.301587301587301) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 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 106 [2021-12-06 18:30:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:17,821 INFO L225 Difference]: With dead ends: 9012 [2021-12-06 18:30:17,821 INFO L226 Difference]: Without dead ends: 6492 [2021-12-06 18:30:17,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1041, Invalid=10514, Unknown=1, NotChecked=0, Total=11556 [2021-12-06 18:30:17,821 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 355 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:17,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 2659 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1144 Invalid, 0 Unknown, 397 Unchecked, 0.3s Time] [2021-12-06 18:30:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6492 states. [2021-12-06 18:30:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6492 to 3995. [2021-12-06 18:30:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3995 states, 3993 states have (on average 1.156023040320561) internal successors, (4616), 3994 states have internal predecessors, (4616), 0 states have call successors, (0), 0 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 18:30:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3995 states to 3995 states and 4616 transitions. [2021-12-06 18:30:17,862 INFO L78 Accepts]: Start accepts. Automaton has 3995 states and 4616 transitions. Word has length 106 [2021-12-06 18:30:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:17,862 INFO L470 AbstractCegarLoop]: Abstraction has 3995 states and 4616 transitions. [2021-12-06 18:30:17,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.301587301587301) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 18:30:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3995 states and 4616 transitions. [2021-12-06 18:30:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 18:30:17,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:17,864 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:17,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 18:30:18,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:18,066 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash -196905228, now seen corresponding path program 14 times [2021-12-06 18:30:18,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:18,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488882358] [2021-12-06 18:30:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:18,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:18,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488882358] [2021-12-06 18:30:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488882358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014477591] [2021-12-06 18:30:18,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:30:18,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:18,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:18,514 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:18,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 18:30:18,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:30:18,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 18:30:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:18,645 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 18:30:18,908 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 14 treesize of output 10 [2021-12-06 18:30:18,957 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 17 treesize of output 19 [2021-12-06 18:30:19,241 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 18:30:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:19,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:19,426 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1911 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1911) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-06 18:30:19,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:30:19,430 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 23 treesize of output 24 [2021-12-06 18:30:19,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:30:19,433 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 37 treesize of output 37 [2021-12-06 18:30:19,435 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 11 treesize of output 7 [2021-12-06 18:30:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:19,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014477591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:19,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:19,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 60 [2021-12-06 18:30:19,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251736556] [2021-12-06 18:30:19,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:19,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:30:19,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:30:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3266, Unknown=1, NotChecked=114, Total=3540 [2021-12-06 18:30:19,632 INFO L87 Difference]: Start difference. First operand 3995 states and 4616 transitions. Second operand has 60 states, 60 states have (on average 3.566666666666667) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:21,801 INFO L93 Difference]: Finished difference Result 6639 states and 7611 transitions. [2021-12-06 18:30:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 18:30:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.566666666666667) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-06 18:30:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:21,804 INFO L225 Difference]: With dead ends: 6639 [2021-12-06 18:30:21,804 INFO L226 Difference]: Without dead ends: 4976 [2021-12-06 18:30:21,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=518, Invalid=9187, Unknown=1, NotChecked=194, Total=9900 [2021-12-06 18:30:21,804 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 256 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 4529 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 4769 SdHoareTripleChecker+Invalid, 4820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:21,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 4769 Invalid, 4820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 4529 Invalid, 0 Unknown, 262 Unchecked, 1.1s Time] [2021-12-06 18:30:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-12-06 18:30:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4210. [2021-12-06 18:30:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4208 states have (on average 1.1561311787072244) internal successors, (4865), 4209 states have internal predecessors, (4865), 0 states have call successors, (0), 0 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 18:30:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 4865 transitions. [2021-12-06 18:30:21,839 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 4865 transitions. Word has length 109 [2021-12-06 18:30:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:21,839 INFO L470 AbstractCegarLoop]: Abstraction has 4210 states and 4865 transitions. [2021-12-06 18:30:21,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.566666666666667) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 4865 transitions. [2021-12-06 18:30:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:30:21,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:21,842 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:21,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 18:30:22,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:22,043 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash 499994957, now seen corresponding path program 20 times [2021-12-06 18:30:22,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:22,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410835140] [2021-12-06 18:30:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:22,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:22,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:22,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410835140] [2021-12-06 18:30:22,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410835140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:22,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697950066] [2021-12-06 18:30:22,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:30:22,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:22,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:22,390 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:22,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 18:30:22,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:30:22,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-06 18:30:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:22,720 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 14 treesize of output 10 [2021-12-06 18:30:22,910 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 18:30:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:22,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:23,029 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 13 [2021-12-06 18:30:23,030 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 26 treesize of output 22 [2021-12-06 18:30:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:23,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697950066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:23,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:23,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 54 [2021-12-06 18:30:23,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156416796] [2021-12-06 18:30:23,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:23,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 18:30:23,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 18:30:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2703, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:30:23,157 INFO L87 Difference]: Start difference. First operand 4210 states and 4865 transitions. Second operand has 54 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 54 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:30:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:24,946 INFO L93 Difference]: Finished difference Result 5703 states and 6492 transitions. [2021-12-06 18:30:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:30:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 54 states have internal predecessors, (174), 0 states have call successors, (0), 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 111 [2021-12-06 18:30:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:24,949 INFO L225 Difference]: With dead ends: 5703 [2021-12-06 18:30:24,949 INFO L226 Difference]: Without dead ends: 4981 [2021-12-06 18:30:24,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=593, Invalid=6213, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:30:24,950 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 844 mSDsluCounter, 5595 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 5778 SdHoareTripleChecker+Invalid, 4789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:24,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 5778 Invalid, 4789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4576 Invalid, 0 Unknown, 100 Unchecked, 1.1s Time] [2021-12-06 18:30:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4981 states. [2021-12-06 18:30:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4981 to 4675. [2021-12-06 18:30:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4673 states have (on average 1.1564305585277124) internal successors, (5404), 4674 states have internal predecessors, (5404), 0 states have call successors, (0), 0 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 18:30:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 5404 transitions. [2021-12-06 18:30:24,980 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 5404 transitions. Word has length 111 [2021-12-06 18:30:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:24,980 INFO L470 AbstractCegarLoop]: Abstraction has 4675 states and 5404 transitions. [2021-12-06 18:30:24,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 54 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:30:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 5404 transitions. [2021-12-06 18:30:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 18:30:24,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:24,983 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:25,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 18:30:25,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:25,184 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1193680631, now seen corresponding path program 15 times [2021-12-06 18:30:25,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:25,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971849016] [2021-12-06 18:30:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:25,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:25,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:25,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971849016] [2021-12-06 18:30:25,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971849016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:25,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684562854] [2021-12-06 18:30:25,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:30:25,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:25,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:25,418 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:25,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 18:30:25,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:30:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 18:30:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:30:25,619 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 9 treesize of output 11 [2021-12-06 18:30:25,620 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 18:30:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:26,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 120 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:26,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684562854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:26,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:26,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 62 [2021-12-06 18:30:26,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729824108] [2021-12-06 18:30:26,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:26,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 18:30:26,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 18:30:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=3472, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:30:26,929 INFO L87 Difference]: Start difference. First operand 4675 states and 5404 transitions. Second operand has 63 states, 62 states have (on average 5.338709677419355) internal successors, (331), 63 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:28,850 INFO L93 Difference]: Finished difference Result 7597 states and 8794 transitions. [2021-12-06 18:30:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:30:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 5.338709677419355) internal successors, (331), 63 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-06 18:30:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:28,855 INFO L225 Difference]: With dead ends: 7597 [2021-12-06 18:30:28,855 INFO L226 Difference]: Without dead ends: 7597 [2021-12-06 18:30:28,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2135, Invalid=8995, Unknown=0, NotChecked=0, Total=11130 [2021-12-06 18:30:28,855 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1115 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:28,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 2444 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:30:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2021-12-06 18:30:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 5047. [2021-12-06 18:30:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5047 states, 5045 states have (on average 1.156788899900892) internal successors, (5836), 5046 states have internal predecessors, (5836), 0 states have call successors, (0), 0 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 18:30:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5047 states to 5047 states and 5836 transitions. [2021-12-06 18:30:28,904 INFO L78 Accepts]: Start accepts. Automaton has 5047 states and 5836 transitions. Word has length 113 [2021-12-06 18:30:28,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:28,904 INFO L470 AbstractCegarLoop]: Abstraction has 5047 states and 5836 transitions. [2021-12-06 18:30:28,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 5.338709677419355) internal successors, (331), 63 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5047 states and 5836 transitions. [2021-12-06 18:30:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 18:30:28,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:28,907 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:28,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 18:30:29,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:29,109 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash -964080841, now seen corresponding path program 6 times [2021-12-06 18:30:29,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:29,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780265124] [2021-12-06 18:30:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:29,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:30:29,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780265124] [2021-12-06 18:30:29,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780265124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919902998] [2021-12-06 18:30:29,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:30:29,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:29,447 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 18:30:29,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 18:30:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 18:30:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:29,923 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 14 treesize of output 10 [2021-12-06 18:30:30,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:30:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:30:30,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:30,253 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 13 [2021-12-06 18:30:30,254 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 26 treesize of output 22 [2021-12-06 18:30:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:30:30,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919902998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:30,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:30,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 51 [2021-12-06 18:30:30,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498183791] [2021-12-06 18:30:30,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:30,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:30:30,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:30:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:30:30,373 INFO L87 Difference]: Start difference. First operand 5047 states and 5836 transitions. Second operand has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 18:30:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:31,891 INFO L93 Difference]: Finished difference Result 5447 states and 6184 transitions. [2021-12-06 18:30:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 18:30:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 states have internal predecessors, (187), 0 states have call successors, (0), 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 114 [2021-12-06 18:30:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:31,894 INFO L225 Difference]: With dead ends: 5447 [2021-12-06 18:30:31,894 INFO L226 Difference]: Without dead ends: 4526 [2021-12-06 18:30:31,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=558, Invalid=5448, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:30:31,894 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 660 mSDsluCounter, 4065 mSDsCounter, 0 mSdLazyCounter, 3419 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 4230 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:31,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 4230 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3419 Invalid, 0 Unknown, 136 Unchecked, 0.9s Time] [2021-12-06 18:30:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4526 states. [2021-12-06 18:30:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4526 to 4301. [2021-12-06 18:30:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4301 states, 4299 states have (on average 1.1484066061874854) internal successors, (4937), 4300 states have internal predecessors, (4937), 0 states have call successors, (0), 0 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 18:30:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4301 states to 4301 states and 4937 transitions. [2021-12-06 18:30:31,924 INFO L78 Accepts]: Start accepts. Automaton has 4301 states and 4937 transitions. Word has length 114 [2021-12-06 18:30:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:31,925 INFO L470 AbstractCegarLoop]: Abstraction has 4301 states and 4937 transitions. [2021-12-06 18:30:31,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 18:30:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4301 states and 4937 transitions. [2021-12-06 18:30:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 18:30:31,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:31,927 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:31,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 18:30:32,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:32,128 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2067150640, now seen corresponding path program 21 times [2021-12-06 18:30:32,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:32,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375607815] [2021-12-06 18:30:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:32,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 153 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:32,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:32,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375607815] [2021-12-06 18:30:32,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375607815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:32,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750235357] [2021-12-06 18:30:32,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:30:32,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:32,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:32,501 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:32,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 18:30:32,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 18:30:32,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 18:30:32,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:33,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:33,758 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 18:30:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:33,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750235357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:33,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:33,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 74 [2021-12-06 18:30:33,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34558800] [2021-12-06 18:30:33,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:33,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 18:30:33,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 18:30:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 18:30:33,811 INFO L87 Difference]: Start difference. First operand 4301 states and 4937 transitions. Second operand has 75 states, 74 states have (on average 3.891891891891892) internal successors, (288), 75 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 18:30:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:35,447 INFO L93 Difference]: Finished difference Result 4958 states and 5600 transitions. [2021-12-06 18:30:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:30:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.891891891891892) internal successors, (288), 75 states have internal predecessors, (288), 0 states have call successors, (0), 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 115 [2021-12-06 18:30:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:35,450 INFO L225 Difference]: With dead ends: 4958 [2021-12-06 18:30:35,450 INFO L226 Difference]: Without dead ends: 4958 [2021-12-06 18:30:35,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2349, Invalid=10083, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 18:30:35,450 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1146 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:35,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1915 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:30:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4958 states. [2021-12-06 18:30:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4958 to 4386. [2021-12-06 18:30:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4384 states have (on average 1.1491788321167884) internal successors, (5038), 4385 states have internal predecessors, (5038), 0 states have call successors, (0), 0 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 18:30:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 5038 transitions. [2021-12-06 18:30:35,481 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 5038 transitions. Word has length 115 [2021-12-06 18:30:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:35,482 INFO L470 AbstractCegarLoop]: Abstraction has 4386 states and 5038 transitions. [2021-12-06 18:30:35,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.891891891891892) internal successors, (288), 75 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 18:30:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 5038 transitions. [2021-12-06 18:30:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:30:35,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:35,484 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:35,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 18:30:35,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:35,686 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1113206431, now seen corresponding path program 22 times [2021-12-06 18:30:35,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:35,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413584622] [2021-12-06 18:30:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:35,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:36,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:36,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413584622] [2021-12-06 18:30:36,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413584622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:36,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517031005] [2021-12-06 18:30:36,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:30:36,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:36,045 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:36,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 18:30:36,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:30:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 18:30:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:36,157 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:30:36,157 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:30:36,658 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 18:30:37,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:30:37,592 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 17 treesize of output 7 [2021-12-06 18:30:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 311 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:37,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:38,459 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 13 treesize of output 11 [2021-12-06 18:30:38,461 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 20 treesize of output 18 [2021-12-06 18:30:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 310 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517031005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:39,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:39,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 95 [2021-12-06 18:30:39,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276868269] [2021-12-06 18:30:39,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:39,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-06 18:30:39,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:39,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-06 18:30:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=8220, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 18:30:39,493 INFO L87 Difference]: Start difference. First operand 4386 states and 5038 transitions. Second operand has 95 states, 95 states have (on average 3.6) internal successors, (342), 95 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:42,475 INFO L93 Difference]: Finished difference Result 5300 states and 6040 transitions. [2021-12-06 18:30:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 18:30:42,476 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.6) internal successors, (342), 95 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-06 18:30:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:42,478 INFO L225 Difference]: With dead ends: 5300 [2021-12-06 18:30:42,478 INFO L226 Difference]: Without dead ends: 5203 [2021-12-06 18:30:42,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7616 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2446, Invalid=25610, Unknown=0, NotChecked=0, Total=28056 [2021-12-06 18:30:42,480 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 444 mSDsluCounter, 3433 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 831 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:42,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 3525 Invalid, 3372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2487 Invalid, 0 Unknown, 831 Unchecked, 0.6s Time] [2021-12-06 18:30:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5203 states. [2021-12-06 18:30:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5203 to 4910. [2021-12-06 18:30:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4908 states have (on average 1.1511817440912795) internal successors, (5650), 4909 states have internal predecessors, (5650), 0 states have call successors, (0), 0 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 18:30:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 5650 transitions. [2021-12-06 18:30:42,516 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 5650 transitions. Word has length 120 [2021-12-06 18:30:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:42,516 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 5650 transitions. [2021-12-06 18:30:42,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.6) internal successors, (342), 95 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 5650 transitions. [2021-12-06 18:30:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 18:30:42,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:42,520 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:42,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 18:30:42,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 18:30:42,721 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:30:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:42,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1939361278, now seen corresponding path program 16 times [2021-12-06 18:30:42,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:42,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182163399] [2021-12-06 18:30:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:42,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 18 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:43,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:43,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182163399] [2021-12-06 18:30:43,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182163399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:43,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497394480] [2021-12-06 18:30:43,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:30:43,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:43,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:43,196 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:43,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 18:30:43,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:30:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:43,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 18:30:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:43,331 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:30:43,331 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:30:44,023 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 14 treesize of output 10 [2021-12-06 18:30:44,090 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:30:44,090 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 17 treesize of output 23 [2021-12-06 18:30:44,109 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 8 treesize of output 3 [2021-12-06 18:31:07,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:07,317 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 22 treesize of output 11 [2021-12-06 18:31:07,323 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:31:07,324 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 20 treesize of output 18 [2021-12-06 18:31:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 249 proven. 177 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:07,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:08,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:08,559 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 21 treesize of output 22 [2021-12-06 18:31:08,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:08,565 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 33 treesize of output 33 [2021-12-06 18:31:08,568 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 18:31:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 250 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:10,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497394480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:10,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:10,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30, 30] total 88 [2021-12-06 18:31:10,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666903951] [2021-12-06 18:31:10,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:10,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 18:31:10,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 18:31:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=7162, Unknown=1, NotChecked=0, Total=7656 [2021-12-06 18:31:10,275 INFO L87 Difference]: Start difference. First operand 4910 states and 5650 transitions. Second operand has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 88 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:20,956 INFO L93 Difference]: Finished difference Result 12836 states and 14805 transitions. [2021-12-06 18:31:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-06 18:31:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 88 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-06 18:31:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:20,964 INFO L225 Difference]: With dead ends: 12836 [2021-12-06 18:31:20,964 INFO L226 Difference]: Without dead ends: 12761 [2021-12-06 18:31:20,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9578 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=2450, Invalid=36554, Unknown=2, NotChecked=0, Total=39006 [2021-12-06 18:31:20,965 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 842 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 4410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 946 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:20,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 2166 Invalid, 4410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3296 Invalid, 0 Unknown, 946 Unchecked, 1.1s Time] [2021-12-06 18:31:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12761 states. [2021-12-06 18:31:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12761 to 8333. [2021-12-06 18:31:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8333 states, 8331 states have (on average 1.1543632217020765) internal successors, (9617), 8332 states have internal predecessors, (9617), 0 states have call successors, (0), 0 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 18:31:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8333 states to 8333 states and 9617 transitions. [2021-12-06 18:31:21,043 INFO L78 Accepts]: Start accepts. Automaton has 8333 states and 9617 transitions. Word has length 121 [2021-12-06 18:31:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:21,044 INFO L470 AbstractCegarLoop]: Abstraction has 8333 states and 9617 transitions. [2021-12-06 18:31:21,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 88 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8333 states and 9617 transitions. [2021-12-06 18:31:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:31:21,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:21,049 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:21,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 18:31:21,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:21,250 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:21,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1756095170, now seen corresponding path program 23 times [2021-12-06 18:31:21,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:21,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076781797] [2021-12-06 18:31:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:21,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:21,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:21,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076781797] [2021-12-06 18:31:21,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076781797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:21,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118864264] [2021-12-06 18:31:21,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:31:21,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:21,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:21,722 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:21,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 18:31:21,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-06 18:31:21,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-06 18:31:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:21,920 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:31:21,921 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:31:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:22,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 276 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:24,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118864264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:24,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:24,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 87 [2021-12-06 18:31:24,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852066094] [2021-12-06 18:31:24,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:24,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 18:31:24,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:24,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 18:31:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=6757, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 18:31:24,041 INFO L87 Difference]: Start difference. First operand 8333 states and 9617 transitions. Second operand has 88 states, 87 states have (on average 4.137931034482759) internal successors, (360), 88 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 18:31:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:26,644 INFO L93 Difference]: Finished difference Result 10912 states and 12508 transitions. [2021-12-06 18:31:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 18:31:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 4.137931034482759) internal successors, (360), 88 states have internal predecessors, (360), 0 states have call successors, (0), 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 124 [2021-12-06 18:31:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:26,650 INFO L225 Difference]: With dead ends: 10912 [2021-12-06 18:31:26,650 INFO L226 Difference]: Without dead ends: 10912 [2021-12-06 18:31:26,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4834 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3767, Invalid=15139, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 18:31:26,651 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 952 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 3569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:26,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 2440 Invalid, 3569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 18:31:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10912 states. [2021-12-06 18:31:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10912 to 9900. [2021-12-06 18:31:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9900 states, 9898 states have (on average 1.16144675692059) internal successors, (11496), 9899 states have internal predecessors, (11496), 0 states have call successors, (0), 0 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 18:31:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9900 states to 9900 states and 11496 transitions. [2021-12-06 18:31:26,736 INFO L78 Accepts]: Start accepts. Automaton has 9900 states and 11496 transitions. Word has length 124 [2021-12-06 18:31:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:26,736 INFO L470 AbstractCegarLoop]: Abstraction has 9900 states and 11496 transitions. [2021-12-06 18:31:26,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 4.137931034482759) internal successors, (360), 88 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 18:31:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 9900 states and 11496 transitions. [2021-12-06 18:31:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 18:31:26,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:26,739 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:26,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 18:31:26,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:26,940 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1679256965, now seen corresponding path program 17 times [2021-12-06 18:31:26,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:26,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321720563] [2021-12-06 18:31:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:26,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 91 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:31:27,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321720563] [2021-12-06 18:31:27,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321720563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817504890] [2021-12-06 18:31:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:31:27,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:27,236 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:27,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 18:31:27,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 18:31:27,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 18:31:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:31:27,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:28,273 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 18:31:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:31:28,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817504890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:28,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:28,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 50 [2021-12-06 18:31:28,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3144291] [2021-12-06 18:31:28,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:28,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:31:28,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:31:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:31:28,331 INFO L87 Difference]: Start difference. First operand 9900 states and 11496 transitions. Second operand has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 18:31:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:29,617 INFO L93 Difference]: Finished difference Result 13324 states and 15469 transitions. [2021-12-06 18:31:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:31:29,618 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 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 125 [2021-12-06 18:31:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:29,625 INFO L225 Difference]: With dead ends: 13324 [2021-12-06 18:31:29,625 INFO L226 Difference]: Without dead ends: 13324 [2021-12-06 18:31:29,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1259, Invalid=5547, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:31:29,626 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 739 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2588 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:29,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2588 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:31:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13324 states. [2021-12-06 18:31:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13324 to 10340. [2021-12-06 18:31:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10340 states, 10338 states have (on average 1.1615399497001355) internal successors, (12008), 10339 states have internal predecessors, (12008), 0 states have call successors, (0), 0 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 18:31:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10340 states to 10340 states and 12008 transitions. [2021-12-06 18:31:29,709 INFO L78 Accepts]: Start accepts. Automaton has 10340 states and 12008 transitions. Word has length 125 [2021-12-06 18:31:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:29,709 INFO L470 AbstractCegarLoop]: Abstraction has 10340 states and 12008 transitions. [2021-12-06 18:31:29,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 18:31:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 10340 states and 12008 transitions. [2021-12-06 18:31:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 18:31:29,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:29,712 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:29,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 18:31:29,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 18:31:29,913 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:29,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1004203597, now seen corresponding path program 24 times [2021-12-06 18:31:29,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:29,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637507602] [2021-12-06 18:31:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:29,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:30,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637507602] [2021-12-06 18:31:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637507602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049835152] [2021-12-06 18:31:30,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:31:30,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:30,413 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:30,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 18:31:30,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-06 18:31:30,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:30,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 150 conjunts are in the unsatisfiable core [2021-12-06 18:31:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:31,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:31:31,435 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 18:31:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:31,613 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 13 [2021-12-06 18:31:31,614 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 26 treesize of output 22 [2021-12-06 18:31:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:31,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049835152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:31,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:31,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 60 [2021-12-06 18:31:31,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032154392] [2021-12-06 18:31:31,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:31,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:31:31,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:31,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:31:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:31:31,801 INFO L87 Difference]: Start difference. First operand 10340 states and 12008 transitions. Second operand has 60 states, 60 states have (on average 3.3333333333333335) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 18:31:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:34,538 INFO L93 Difference]: Finished difference Result 13194 states and 15156 transitions. [2021-12-06 18:31:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:31:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.3333333333333335) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 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 129 [2021-12-06 18:31:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:34,546 INFO L225 Difference]: With dead ends: 13194 [2021-12-06 18:31:34,546 INFO L226 Difference]: Without dead ends: 12306 [2021-12-06 18:31:34,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=663, Invalid=7893, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 18:31:34,547 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 994 mSDsluCounter, 7116 mSDsCounter, 0 mSdLazyCounter, 5755 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 7335 SdHoareTripleChecker+Invalid, 6049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 5755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:34,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 7335 Invalid, 6049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 5755 Invalid, 0 Unknown, 174 Unchecked, 1.6s Time] [2021-12-06 18:31:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12306 states. [2021-12-06 18:31:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12306 to 11587. [2021-12-06 18:31:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11587 states, 11585 states have (on average 1.1624514458351316) internal successors, (13467), 11586 states have internal predecessors, (13467), 0 states have call successors, (0), 0 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 18:31:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11587 states to 11587 states and 13467 transitions. [2021-12-06 18:31:34,633 INFO L78 Accepts]: Start accepts. Automaton has 11587 states and 13467 transitions. Word has length 129 [2021-12-06 18:31:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:34,633 INFO L470 AbstractCegarLoop]: Abstraction has 11587 states and 13467 transitions. [2021-12-06 18:31:34,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.3333333333333335) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 18:31:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 11587 states and 13467 transitions. [2021-12-06 18:31:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 18:31:34,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:34,636 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:34,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 18:31:34,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 18:31:34,837 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash 251620040, now seen corresponding path program 5 times [2021-12-06 18:31:34,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:34,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173052686] [2021-12-06 18:31:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:34,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 455 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:31:35,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173052686] [2021-12-06 18:31:35,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173052686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:35,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751107477] [2021-12-06 18:31:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:31:35,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:35,485 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 18:31:35,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 18:31:35,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-06 18:31:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:35,742 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 18:31:36,165 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 14 treesize of output 10 [2021-12-06 18:31:36,215 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 17 treesize of output 19 [2021-12-06 18:31:36,445 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 18:31:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 19 proven. 448 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:31:36,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:36,669 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2533 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2533) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-12-06 18:31:36,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:36,673 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 23 treesize of output 24 [2021-12-06 18:31:36,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:36,677 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 37 treesize of output 37 [2021-12-06 18:31:36,680 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 11 treesize of output 7 [2021-12-06 18:31:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 449 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:31:36,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751107477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:36,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:36,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 52 [2021-12-06 18:31:36,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557811927] [2021-12-06 18:31:36,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:36,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 18:31:36,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:36,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 18:31:36,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2425, Unknown=1, NotChecked=98, Total=2652 [2021-12-06 18:31:36,982 INFO L87 Difference]: Start difference. First operand 11587 states and 13467 transitions. Second operand has 52 states, 52 states have (on average 3.519230769230769) internal successors, (183), 52 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 18:31:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:39,330 INFO L93 Difference]: Finished difference Result 11578 states and 13358 transitions. [2021-12-06 18:31:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:31:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.519230769230769) internal successors, (183), 52 states have internal predecessors, (183), 0 states have call successors, (0), 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 130 [2021-12-06 18:31:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:39,335 INFO L225 Difference]: With dead ends: 11578 [2021-12-06 18:31:39,335 INFO L226 Difference]: Without dead ends: 8308 [2021-12-06 18:31:39,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=429, Invalid=7946, Unknown=1, NotChecked=180, Total=8556 [2021-12-06 18:31:39,336 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 319 mSDsluCounter, 4419 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 4558 SdHoareTripleChecker+Invalid, 4072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:39,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 4558 Invalid, 4072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3775 Invalid, 0 Unknown, 269 Unchecked, 1.2s Time] [2021-12-06 18:31:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8308 states. [2021-12-06 18:31:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8308 to 7278. [2021-12-06 18:31:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7278 states, 7276 states have (on average 1.1601154480483782) internal successors, (8441), 7277 states have internal predecessors, (8441), 0 states have call successors, (0), 0 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 18:31:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7278 states to 7278 states and 8441 transitions. [2021-12-06 18:31:39,398 INFO L78 Accepts]: Start accepts. Automaton has 7278 states and 8441 transitions. Word has length 130 [2021-12-06 18:31:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:39,398 INFO L470 AbstractCegarLoop]: Abstraction has 7278 states and 8441 transitions. [2021-12-06 18:31:39,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.519230769230769) internal successors, (183), 52 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 18:31:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 7278 states and 8441 transitions. [2021-12-06 18:31:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 18:31:39,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:39,400 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:39,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 18:31:39,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:39,601 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -438419631, now seen corresponding path program 7 times [2021-12-06 18:31:39,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:39,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54302947] [2021-12-06 18:31:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:39,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 38 proven. 609 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:31:40,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54302947] [2021-12-06 18:31:40,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54302947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25246950] [2021-12-06 18:31:40,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:31:40,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:40,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:40,037 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:40,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 18:31:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-06 18:31:40,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:40,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:31:40,741 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 18:31:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 38 proven. 609 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:31:40,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:40,894 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 13 [2021-12-06 18:31:40,895 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 26 treesize of output 22 [2021-12-06 18:31:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 38 proven. 609 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:31:41,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25246950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:41,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:41,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 57 [2021-12-06 18:31:41,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375393466] [2021-12-06 18:31:41,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:41,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 18:31:41,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:41,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 18:31:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 18:31:41,059 INFO L87 Difference]: Start difference. First operand 7278 states and 8441 transitions. Second operand has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 57 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:43,425 INFO L93 Difference]: Finished difference Result 7840 states and 8943 transitions. [2021-12-06 18:31:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:31:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 57 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-06 18:31:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:43,429 INFO L225 Difference]: With dead ends: 7840 [2021-12-06 18:31:43,430 INFO L226 Difference]: Without dead ends: 6580 [2021-12-06 18:31:43,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=628, Invalid=7028, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 18:31:43,430 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 939 mSDsluCounter, 6080 mSDsCounter, 0 mSdLazyCounter, 5221 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 6281 SdHoareTripleChecker+Invalid, 5443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 5221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:43,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 6281 Invalid, 5443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 5221 Invalid, 0 Unknown, 111 Unchecked, 1.4s Time] [2021-12-06 18:31:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2021-12-06 18:31:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 6269. [2021-12-06 18:31:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6269 states, 6267 states have (on average 1.1530237753310995) internal successors, (7226), 6268 states have internal predecessors, (7226), 0 states have call successors, (0), 0 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 18:31:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 7226 transitions. [2021-12-06 18:31:43,473 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 7226 transitions. Word has length 132 [2021-12-06 18:31:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:43,473 INFO L470 AbstractCegarLoop]: Abstraction has 6269 states and 7226 transitions. [2021-12-06 18:31:43,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 57 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 7226 transitions. [2021-12-06 18:31:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 18:31:43,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:43,475 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:43,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 18:31:43,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:43,676 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:43,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1438764662, now seen corresponding path program 25 times [2021-12-06 18:31:43,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:43,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621392968] [2021-12-06 18:31:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:43,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 231 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:44,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621392968] [2021-12-06 18:31:44,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621392968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775061094] [2021-12-06 18:31:44,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:31:44,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:44,127 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:44,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 18:31:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 18:31:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 276 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:44,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:45,518 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 18:31:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 276 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:45,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775061094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:45,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:45,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 70 [2021-12-06 18:31:45,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779178302] [2021-12-06 18:31:45,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:45,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 18:31:45,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 18:31:45,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:31:45,588 INFO L87 Difference]: Start difference. First operand 6269 states and 7226 transitions. Second operand has 71 states, 70 states have (on average 3.842857142857143) internal successors, (269), 71 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:48,290 INFO L93 Difference]: Finished difference Result 7116 states and 8079 transitions. [2021-12-06 18:31:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 18:31:48,290 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.842857142857143) internal successors, (269), 71 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-06 18:31:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:48,294 INFO L225 Difference]: With dead ends: 7116 [2021-12-06 18:31:48,294 INFO L226 Difference]: Without dead ends: 7116 [2021-12-06 18:31:48,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2431, Invalid=10451, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 18:31:48,295 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 839 mSDsluCounter, 3297 mSDsCounter, 0 mSdLazyCounter, 4665 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 3410 SdHoareTripleChecker+Invalid, 4739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 4665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:48,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 3410 Invalid, 4739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 4665 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 18:31:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2021-12-06 18:31:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 6364. [2021-12-06 18:31:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6364 states, 6362 states have (on average 1.1535680603583778) internal successors, (7339), 6363 states have internal predecessors, (7339), 0 states have call successors, (0), 0 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 18:31:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6364 states to 6364 states and 7339 transitions. [2021-12-06 18:31:48,342 INFO L78 Accepts]: Start accepts. Automaton has 6364 states and 7339 transitions. Word has length 133 [2021-12-06 18:31:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:48,343 INFO L470 AbstractCegarLoop]: Abstraction has 6364 states and 7339 transitions. [2021-12-06 18:31:48,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.842857142857143) internal successors, (269), 71 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6364 states and 7339 transitions. [2021-12-06 18:31:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 18:31:48,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:48,345 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:48,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 18:31:48,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:48,546 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1075876496, now seen corresponding path program 18 times [2021-12-06 18:31:48,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:48,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805871802] [2021-12-06 18:31:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:48,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:31:49,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805871802] [2021-12-06 18:31:49,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805871802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544770416] [2021-12-06 18:31:49,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:31:49,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:49,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:49,117 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:49,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 18:31:49,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 18:31:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:49,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 177 conjunts are in the unsatisfiable core [2021-12-06 18:31:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:50,054 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 14 treesize of output 10 [2021-12-06 18:31:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,122 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 25 treesize of output 24 [2021-12-06 18:31:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:53,180 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 18:31:53,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 27 [2021-12-06 18:31:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:53,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:54,027 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-12-06 18:31:54,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 309 [2021-12-06 18:31:54,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:54,034 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 301 treesize of output 285 [2021-12-06 18:31:54,155 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 88 treesize of output 82 [2021-12-06 18:31:54,172 INFO L354 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2021-12-06 18:31:54,172 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 29 treesize of output 18 [2021-12-06 18:31:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 36 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544770416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:55,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:55,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 43, 43] total 105 [2021-12-06 18:31:55,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147922368] [2021-12-06 18:31:55,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:55,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-06 18:31:55,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-06 18:31:55,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=10495, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 18:31:55,350 INFO L87 Difference]: Start difference. First operand 6364 states and 7339 transitions. Second operand has 105 states, 105 states have (on average 3.0761904761904764) internal successors, (323), 105 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 18:31:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:58,888 INFO L93 Difference]: Finished difference Result 10832 states and 12497 transitions. [2021-12-06 18:31:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-06 18:31:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.0761904761904764) internal successors, (323), 105 states have internal predecessors, (323), 0 states have call successors, (0), 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 133 [2021-12-06 18:31:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:58,894 INFO L225 Difference]: With dead ends: 10832 [2021-12-06 18:31:58,894 INFO L226 Difference]: Without dead ends: 10749 [2021-12-06 18:31:58,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5220 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=928, Invalid=23878, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 18:31:58,895 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 393 mSDsluCounter, 5960 mSDsCounter, 0 mSdLazyCounter, 3587 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 6075 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1336 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:58,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 6075 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3587 Invalid, 0 Unknown, 1336 Unchecked, 1.2s Time] [2021-12-06 18:31:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-12-06 18:31:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 10654. [2021-12-06 18:31:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10654 states, 10652 states have (on average 1.155933158092377) internal successors, (12313), 10653 states have internal predecessors, (12313), 0 states have call successors, (0), 0 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 18:31:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10654 states to 10654 states and 12313 transitions. [2021-12-06 18:31:58,966 INFO L78 Accepts]: Start accepts. Automaton has 10654 states and 12313 transitions. Word has length 133 [2021-12-06 18:31:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:58,966 INFO L470 AbstractCegarLoop]: Abstraction has 10654 states and 12313 transitions. [2021-12-06 18:31:58,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.0761904761904764) internal successors, (323), 105 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 18:31:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 10654 states and 12313 transitions. [2021-12-06 18:31:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 18:31:58,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:58,970 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:58,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-06 18:31:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:59,170 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:31:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash -870571629, now seen corresponding path program 19 times [2021-12-06 18:31:59,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:59,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887946991] [2021-12-06 18:31:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:59,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 120 proven. 450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:31:59,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887946991] [2021-12-06 18:31:59,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887946991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801465333] [2021-12-06 18:31:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:31:59,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:59,502 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:59,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 18:31:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 18:31:59,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 153 proven. 417 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:00,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:00,654 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 18:32:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 153 proven. 417 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:00,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801465333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:00,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:00,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 54 [2021-12-06 18:32:00,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516701000] [2021-12-06 18:32:00,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:00,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 18:32:00,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:00,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 18:32:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2637, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 18:32:00,723 INFO L87 Difference]: Start difference. First operand 10654 states and 12313 transitions. Second operand has 55 states, 54 states have (on average 5.092592592592593) internal successors, (275), 55 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 18:32:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:02,304 INFO L93 Difference]: Finished difference Result 18101 states and 20959 transitions. [2021-12-06 18:32:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 18:32:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 5.092592592592593) internal successors, (275), 55 states have internal predecessors, (275), 0 states have call successors, (0), 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 137 [2021-12-06 18:32:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:02,316 INFO L225 Difference]: With dead ends: 18101 [2021-12-06 18:32:02,316 INFO L226 Difference]: Without dead ends: 18101 [2021-12-06 18:32:02,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1484, Invalid=6526, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 18:32:02,317 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 847 mSDsluCounter, 2957 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:02,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 3122 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:32:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2021-12-06 18:32:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 11155. [2021-12-06 18:32:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11153 states have (on average 1.1561911593293284) internal successors, (12895), 11154 states have internal predecessors, (12895), 0 states have call successors, (0), 0 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 18:32:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 12895 transitions. [2021-12-06 18:32:02,428 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 12895 transitions. Word has length 137 [2021-12-06 18:32:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 11155 states and 12895 transitions. [2021-12-06 18:32:02,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 5.092592592592593) internal successors, (275), 55 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 18:32:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 12895 transitions. [2021-12-06 18:32:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 18:32:02,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:02,431 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:02,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 18:32:02,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-12-06 18:32:02,632 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:32:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1798136699, now seen corresponding path program 26 times [2021-12-06 18:32:02,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:02,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093866856] [2021-12-06 18:32:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:02,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:03,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093866856] [2021-12-06 18:32:03,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093866856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508866165] [2021-12-06 18:32:03,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:32:03,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:03,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:03,178 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:03,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 18:32:03,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:32:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-06 18:32:03,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:03,645 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 14 treesize of output 10 [2021-12-06 18:32:05,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:05,778 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 20 treesize of output 20 [2021-12-06 18:32:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 276 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:05,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:07,644 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 13 [2021-12-06 18:32:07,646 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 18:32:07,649 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 26 treesize of output 22 [2021-12-06 18:32:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 276 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:07,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508866165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:07,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:07,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 97 [2021-12-06 18:32:07,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892252360] [2021-12-06 18:32:07,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:07,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 18:32:07,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 18:32:07,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=8745, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 18:32:07,733 INFO L87 Difference]: Start difference. First operand 11155 states and 12895 transitions. Second operand has 97 states, 97 states have (on average 3.597938144329897) internal successors, (349), 97 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 18:32:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:13,205 INFO L93 Difference]: Finished difference Result 13426 states and 15385 transitions. [2021-12-06 18:32:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-06 18:32:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.597938144329897) internal successors, (349), 97 states have internal predecessors, (349), 0 states have call successors, (0), 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 138 [2021-12-06 18:32:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:13,213 INFO L225 Difference]: With dead ends: 13426 [2021-12-06 18:32:13,213 INFO L226 Difference]: Without dead ends: 13311 [2021-12-06 18:32:13,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6306 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1504, Invalid=23618, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 18:32:13,214 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 1133 mSDsluCounter, 7516 mSDsCounter, 0 mSdLazyCounter, 5433 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 7755 SdHoareTripleChecker+Invalid, 8653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3173 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:13,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 7755 Invalid, 8653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5433 Invalid, 0 Unknown, 3173 Unchecked, 1.8s Time] [2021-12-06 18:32:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13311 states. [2021-12-06 18:32:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13311 to 11988. [2021-12-06 18:32:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11988 states, 11986 states have (on average 1.1570165192724846) internal successors, (13868), 11987 states have internal predecessors, (13868), 0 states have call successors, (0), 0 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 18:32:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11988 states to 11988 states and 13868 transitions. [2021-12-06 18:32:13,307 INFO L78 Accepts]: Start accepts. Automaton has 11988 states and 13868 transitions. Word has length 138 [2021-12-06 18:32:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:13,307 INFO L470 AbstractCegarLoop]: Abstraction has 11988 states and 13868 transitions. [2021-12-06 18:32:13,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.597938144329897) internal successors, (349), 97 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 18:32:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11988 states and 13868 transitions. [2021-12-06 18:32:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 18:32:13,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:13,312 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:13,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 18:32:13,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:13,513 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:32:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1944170630, now seen corresponding path program 6 times [2021-12-06 18:32:13,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:13,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737899413] [2021-12-06 18:32:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:13,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 20 proven. 559 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:32:14,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737899413] [2021-12-06 18:32:14,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737899413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141056796] [2021-12-06 18:32:14,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:32:14,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:14,014 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:14,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 18:32:14,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 18:32:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:14,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 18:32:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:14,375 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 18:32:14,728 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 14 treesize of output 10 [2021-12-06 18:32:14,774 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 17 treesize of output 19 [2021-12-06 18:32:14,956 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 18:32:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 21 proven. 558 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:32:14,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:15,130 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2934 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2934) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-06 18:32:15,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:15,134 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 23 treesize of output 24 [2021-12-06 18:32:15,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:15,138 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 37 treesize of output 37 [2021-12-06 18:32:15,139 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 11 treesize of output 7 [2021-12-06 18:32:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 20 proven. 559 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:32:15,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141056796] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:15,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:15,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 51 [2021-12-06 18:32:15,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136909026] [2021-12-06 18:32:15,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:15,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:32:15,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:32:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2314, Unknown=1, NotChecked=96, Total=2550 [2021-12-06 18:32:15,387 INFO L87 Difference]: Start difference. First operand 11988 states and 13868 transitions. Second operand has 51 states, 51 states have (on average 3.823529411764706) internal successors, (195), 51 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 18:32:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:17,421 INFO L93 Difference]: Finished difference Result 16207 states and 18685 transitions. [2021-12-06 18:32:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 18:32:17,422 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.823529411764706) internal successors, (195), 51 states have internal predecessors, (195), 0 states have call successors, (0), 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 142 [2021-12-06 18:32:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:17,427 INFO L225 Difference]: With dead ends: 16207 [2021-12-06 18:32:17,427 INFO L226 Difference]: Without dead ends: 9079 [2021-12-06 18:32:17,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=6738, Unknown=1, NotChecked=166, Total=7310 [2021-12-06 18:32:17,428 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 364 mSDsluCounter, 4909 mSDsCounter, 0 mSdLazyCounter, 3660 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 5063 SdHoareTripleChecker+Invalid, 3915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:17,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 5063 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3660 Invalid, 0 Unknown, 219 Unchecked, 1.1s Time] [2021-12-06 18:32:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9079 states. [2021-12-06 18:32:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9079 to 7837. [2021-12-06 18:32:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7837 states, 7835 states have (on average 1.1550733886407147) internal successors, (9050), 7836 states have internal predecessors, (9050), 0 states have call successors, (0), 0 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 18:32:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7837 states to 7837 states and 9050 transitions. [2021-12-06 18:32:17,490 INFO L78 Accepts]: Start accepts. Automaton has 7837 states and 9050 transitions. Word has length 142 [2021-12-06 18:32:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:17,490 INFO L470 AbstractCegarLoop]: Abstraction has 7837 states and 9050 transitions. [2021-12-06 18:32:17,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.823529411764706) internal successors, (195), 51 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 18:32:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 7837 states and 9050 transitions. [2021-12-06 18:32:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 18:32:17,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:17,493 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:17,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 18:32:17,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:17,694 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:32:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1645258594, now seen corresponding path program 20 times [2021-12-06 18:32:17,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:17,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080140922] [2021-12-06 18:32:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:17,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:18,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080140922] [2021-12-06 18:32:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080140922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631830701] [2021-12-06 18:32:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:32:18,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:18,399 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:18,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 18:32:18,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:32:18,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 187 conjunts are in the unsatisfiable core [2021-12-06 18:32:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:18,603 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 18:32:19,230 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 14 treesize of output 10 [2021-12-06 18:32:19,293 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 17 treesize of output 19 [2021-12-06 18:32:21,531 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 18:32:21,532 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-06 18:32:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:21,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:22,704 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3000 (Array Int Int))) (let ((.cse0 (select v_ArrVal_3000 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3000) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) .cse0))))) is different from false [2021-12-06 18:32:22,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:22,708 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 26 treesize of output 27 [2021-12-06 18:32:22,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:22,713 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 44 treesize of output 44 [2021-12-06 18:32:22,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:22,718 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 32 treesize of output 32 [2021-12-06 18:32:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 27 proven. 625 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:23,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631830701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:23,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:23,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 107 [2021-12-06 18:32:23,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22470185] [2021-12-06 18:32:23,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:23,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 18:32:23,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 18:32:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=10781, Unknown=1, NotChecked=208, Total=11342 [2021-12-06 18:32:23,602 INFO L87 Difference]: Start difference. First operand 7837 states and 9050 transitions. Second operand has 107 states, 107 states have (on average 3.803738317757009) internal successors, (407), 107 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 18:32:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:26,738 INFO L93 Difference]: Finished difference Result 17561 states and 20277 transitions. [2021-12-06 18:32:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-06 18:32:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.803738317757009) internal successors, (407), 107 states have internal predecessors, (407), 0 states have call successors, (0), 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 145 [2021-12-06 18:32:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:26,749 INFO L225 Difference]: With dead ends: 17561 [2021-12-06 18:32:26,749 INFO L226 Difference]: Without dead ends: 17470 [2021-12-06 18:32:26,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=648, Invalid=21705, Unknown=1, NotChecked=296, Total=22650 [2021-12-06 18:32:26,750 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 333 mSDsluCounter, 7293 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 7423 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1452 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:26,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 7423 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2588 Invalid, 0 Unknown, 1452 Unchecked, 0.8s Time] [2021-12-06 18:32:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17470 states. [2021-12-06 18:32:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17470 to 12640. [2021-12-06 18:32:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12640 states, 12638 states have (on average 1.1569077385662287) internal successors, (14621), 12639 states have internal predecessors, (14621), 0 states have call successors, (0), 0 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 18:32:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12640 states to 12640 states and 14621 transitions. [2021-12-06 18:32:26,856 INFO L78 Accepts]: Start accepts. Automaton has 12640 states and 14621 transitions. Word has length 145 [2021-12-06 18:32:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:26,856 INFO L470 AbstractCegarLoop]: Abstraction has 12640 states and 14621 transitions. [2021-12-06 18:32:26,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.803738317757009) internal successors, (407), 107 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 18:32:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 12640 states and 14621 transitions. [2021-12-06 18:32:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 18:32:26,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:26,861 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:26,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 18:32:27,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-06 18:32:27,062 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:32:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1879364889, now seen corresponding path program 27 times [2021-12-06 18:32:27,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:27,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150700746] [2021-12-06 18:32:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:27,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 44 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:27,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150700746] [2021-12-06 18:32:27,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150700746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103494687] [2021-12-06 18:32:27,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:32:27,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:27,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:27,626 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:27,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 18:32:28,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-06 18:32:28,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-06 18:32:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:28,500 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 14 treesize of output 10 [2021-12-06 18:32:28,768 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 18:32:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 44 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:28,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:28,931 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 13 [2021-12-06 18:32:28,932 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 26 treesize of output 22 [2021-12-06 18:32:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 44 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:29,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103494687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:29,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:29,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 66 [2021-12-06 18:32:29,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709772250] [2021-12-06 18:32:29,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:29,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 18:32:29,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 18:32:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 18:32:29,111 INFO L87 Difference]: Start difference. First operand 12640 states and 14621 transitions. Second operand has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 18:32:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:32,451 INFO L93 Difference]: Finished difference Result 18953 states and 21840 transitions. [2021-12-06 18:32:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 18:32:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 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 147 [2021-12-06 18:32:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:32,463 INFO L225 Difference]: With dead ends: 18953 [2021-12-06 18:32:32,463 INFO L226 Difference]: Without dead ends: 18793 [2021-12-06 18:32:32,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=661, Invalid=10051, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 18:32:32,464 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 1105 mSDsluCounter, 8858 mSDsCounter, 0 mSdLazyCounter, 7134 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 9113 SdHoareTripleChecker+Invalid, 7700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 7134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:32,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 9113 Invalid, 7700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 7134 Invalid, 0 Unknown, 382 Unchecked, 2.0s Time] [2021-12-06 18:32:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18793 states. [2021-12-06 18:32:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18793 to 15515. [2021-12-06 18:32:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15515 states, 15513 states have (on average 1.1613485463804551) internal successors, (18016), 15514 states have internal predecessors, (18016), 0 states have call successors, (0), 0 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 18:32:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 18016 transitions. [2021-12-06 18:32:32,589 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 18016 transitions. Word has length 147 [2021-12-06 18:32:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:32,589 INFO L470 AbstractCegarLoop]: Abstraction has 15515 states and 18016 transitions. [2021-12-06 18:32:32,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 18:32:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 18016 transitions. [2021-12-06 18:32:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 18:32:32,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:32,609 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:32,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 18:32:32,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-06 18:32:32,810 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:32:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash 93682465, now seen corresponding path program 21 times [2021-12-06 18:32:32,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:32,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109847513] [2021-12-06 18:32:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:32,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 153 proven. 540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:33,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:33,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109847513] [2021-12-06 18:32:33,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109847513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:33,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843105795] [2021-12-06 18:32:33,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:32:33,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:33,203 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:33,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 18:32:33,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 18:32:33,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 18:32:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 190 proven. 503 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:34,807 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 18:32:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 190 proven. 503 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:34,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843105795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:34,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:34,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2021-12-06 18:32:34,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54860154] [2021-12-06 18:32:34,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:34,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 18:32:34,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 18:32:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=4286, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:32:34,881 INFO L87 Difference]: Start difference. First operand 15515 states and 18016 transitions. Second operand has 71 states, 70 states have (on average 5.5285714285714285) internal successors, (387), 71 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:36,377 INFO L93 Difference]: Finished difference Result 23762 states and 27561 transitions. [2021-12-06 18:32:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:32:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 5.5285714285714285) internal successors, (387), 71 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-06 18:32:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:36,391 INFO L225 Difference]: With dead ends: 23762 [2021-12-06 18:32:36,391 INFO L226 Difference]: Without dead ends: 23762 [2021-12-06 18:32:36,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=9561, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 18:32:36,392 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 1061 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:36,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 2312 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:32:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23762 states. [2021-12-06 18:32:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23762 to 16089. [2021-12-06 18:32:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16089 states, 16087 states have (on average 1.161496860819295) internal successors, (18685), 16088 states have internal predecessors, (18685), 0 states have call successors, (0), 0 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 18:32:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16089 states to 16089 states and 18685 transitions. [2021-12-06 18:32:36,537 INFO L78 Accepts]: Start accepts. Automaton has 16089 states and 18685 transitions. Word has length 149 [2021-12-06 18:32:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:36,537 INFO L470 AbstractCegarLoop]: Abstraction has 16089 states and 18685 transitions. [2021-12-06 18:32:36,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 5.5285714285714285) internal successors, (387), 71 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 16089 states and 18685 transitions. [2021-12-06 18:32:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 18:32:36,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:36,542 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:36,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-12-06 18:32:36,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-06 18:32:36,743 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:32:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash -195231637, now seen corresponding path program 8 times [2021-12-06 18:32:36,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:36,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143727684] [2021-12-06 18:32:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:36,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 44 proven. 836 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:32:37,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143727684] [2021-12-06 18:32:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143727684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276778492] [2021-12-06 18:32:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:32:37,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:37,305 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:37,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 18:32:37,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:32:37,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 18:32:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:37,948 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 14 treesize of output 10 [2021-12-06 18:32:40,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:32:40,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:40,040 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 18 treesize of output 10 [2021-12-06 18:32:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 44 proven. 836 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:32:40,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:40,372 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 13 [2021-12-06 18:32:40,374 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 26 treesize of output 22 [2021-12-06 18:32:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 44 proven. 836 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:32:41,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276778492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:41,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:41,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 94 [2021-12-06 18:32:41,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858555042] [2021-12-06 18:32:41,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:41,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 18:32:41,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:41,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 18:32:41,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=8402, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:32:41,344 INFO L87 Difference]: Start difference. First operand 16089 states and 18685 transitions. Second operand has 94 states, 94 states have (on average 3.776595744680851) internal successors, (355), 94 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 18:32:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:43,920 INFO L93 Difference]: Finished difference Result 18868 states and 21776 transitions. [2021-12-06 18:32:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 18:32:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.776595744680851) internal successors, (355), 94 states have internal predecessors, (355), 0 states have call successors, (0), 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 150 [2021-12-06 18:32:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:43,931 INFO L225 Difference]: With dead ends: 18868 [2021-12-06 18:32:43,931 INFO L226 Difference]: Without dead ends: 17289 [2021-12-06 18:32:43,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5285 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=698, Invalid=16332, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 18:32:43,932 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 538 mSDsluCounter, 10626 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 10863 SdHoareTripleChecker+Invalid, 5974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1636 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:43,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 10863 Invalid, 5974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4289 Invalid, 0 Unknown, 1636 Unchecked, 1.3s Time] [2021-12-06 18:32:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-12-06 18:32:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 16760. [2021-12-06 18:32:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16760 states, 16758 states have (on average 1.1617734813223535) internal successors, (19469), 16759 states have internal predecessors, (19469), 0 states have call successors, (0), 0 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 18:32:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 19469 transitions. [2021-12-06 18:32:44,054 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 19469 transitions. Word has length 150 [2021-12-06 18:32:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:44,054 INFO L470 AbstractCegarLoop]: Abstraction has 16760 states and 19469 transitions. [2021-12-06 18:32:44,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.776595744680851) internal successors, (355), 94 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 18:32:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 19469 transitions. [2021-12-06 18:32:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 18:32:44,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:44,059 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:44,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-12-06 18:32:44,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:44,260 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:32:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash 456328988, now seen corresponding path program 28 times [2021-12-06 18:32:44,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:44,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381804612] [2021-12-06 18:32:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:44,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 325 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:44,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:44,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381804612] [2021-12-06 18:32:44,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381804612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:44,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631105879] [2021-12-06 18:32:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:32:44,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:44,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:44,765 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:44,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 18:32:44,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:32:44,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:44,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-06 18:32:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:44,911 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:32:44,912 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:32:45,618 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 16 treesize of output 12 [2021-12-06 18:32:46,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:32:46,772 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 21 treesize of output 21 [2021-12-06 18:32:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 392 proven. 598 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:47,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:48,742 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 13 [2021-12-06 18:32:48,745 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 26 treesize of output 22 [2021-12-06 18:32:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 435 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:51,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631105879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:51,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:51,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 41, 41] total 118 [2021-12-06 18:32:51,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054262603] [2021-12-06 18:32:51,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:51,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 18:32:51,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 18:32:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=12666, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 18:32:51,269 INFO L87 Difference]: Start difference. First operand 16760 states and 19469 transitions. Second operand has 119 states, 118 states have (on average 3.7711864406779663) internal successors, (445), 119 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 18:33:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:00,684 INFO L93 Difference]: Finished difference Result 18479 states and 21299 transitions. [2021-12-06 18:33:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-06 18:33:00,684 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 3.7711864406779663) internal successors, (445), 119 states have internal predecessors, (445), 0 states have call successors, (0), 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 151 [2021-12-06 18:33:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:00,695 INFO L225 Difference]: With dead ends: 18479 [2021-12-06 18:33:00,695 INFO L226 Difference]: Without dead ends: 18479 [2021-12-06 18:33:00,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8012 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=9131, Invalid=38611, Unknown=0, NotChecked=0, Total=47742 [2021-12-06 18:33:00,697 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 1503 mSDsluCounter, 6021 mSDsCounter, 0 mSdLazyCounter, 7061 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 6201 SdHoareTripleChecker+Invalid, 7701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 7061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:00,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 6201 Invalid, 7701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 7061 Invalid, 0 Unknown, 373 Unchecked, 2.8s Time] [2021-12-06 18:33:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18479 states. [2021-12-06 18:33:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18479 to 16880. [2021-12-06 18:33:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16880 states, 16878 states have (on average 1.1619267685744756) internal successors, (19611), 16879 states have internal predecessors, (19611), 0 states have call successors, (0), 0 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 18:33:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16880 states to 16880 states and 19611 transitions. [2021-12-06 18:33:00,833 INFO L78 Accepts]: Start accepts. Automaton has 16880 states and 19611 transitions. Word has length 151 [2021-12-06 18:33:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:00,833 INFO L470 AbstractCegarLoop]: Abstraction has 16880 states and 19611 transitions. [2021-12-06 18:33:00,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 3.7711864406779663) internal successors, (445), 119 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 18:33:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 16880 states and 19611 transitions. [2021-12-06 18:33:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 18:33:00,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:00,839 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:00,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 18:33:01,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:01,039 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:33:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:01,041 INFO L85 PathProgramCache]: Analyzing trace with hash -825574264, now seen corresponding path program 9 times [2021-12-06 18:33:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:01,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551317131] [2021-12-06 18:33:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:01,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 276 proven. 657 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:33:01,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:01,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551317131] [2021-12-06 18:33:01,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551317131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:01,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981387514] [2021-12-06 18:33:01,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:33:01,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:01,558 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:01,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 18:33:02,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-06 18:33:02,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-06 18:33:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 325 proven. 608 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:33:02,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:03,767 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 18:33:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 325 proven. 608 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:33:03,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981387514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:03,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:03,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 89 [2021-12-06 18:33:03,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187476518] [2021-12-06 18:33:03,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:03,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 18:33:03,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:03,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 18:33:03,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1054, Invalid=6956, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 18:33:03,854 INFO L87 Difference]: Start difference. First operand 16880 states and 19611 transitions. Second operand has 90 states, 89 states have (on average 4.303370786516854) internal successors, (383), 90 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 18:33:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:06,542 INFO L93 Difference]: Finished difference Result 20109 states and 22970 transitions. [2021-12-06 18:33:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 18:33:06,543 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.303370786516854) internal successors, (383), 90 states have internal predecessors, (383), 0 states have call successors, (0), 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 154 [2021-12-06 18:33:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:06,554 INFO L225 Difference]: With dead ends: 20109 [2021-12-06 18:33:06,554 INFO L226 Difference]: Without dead ends: 18415 [2021-12-06 18:33:06,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3483, Invalid=14877, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 18:33:06,556 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1056 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 3371 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:06,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 2622 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3371 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 18:33:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18415 states. [2021-12-06 18:33:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18415 to 15632. [2021-12-06 18:33:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15632 states, 15630 states have (on average 1.1596289187460014) internal successors, (18125), 15631 states have internal predecessors, (18125), 0 states have call successors, (0), 0 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 18:33:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15632 states to 15632 states and 18125 transitions. [2021-12-06 18:33:06,683 INFO L78 Accepts]: Start accepts. Automaton has 15632 states and 18125 transitions. Word has length 154 [2021-12-06 18:33:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:06,683 INFO L470 AbstractCegarLoop]: Abstraction has 15632 states and 18125 transitions. [2021-12-06 18:33:06,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.303370786516854) internal successors, (383), 90 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 18:33:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 15632 states and 18125 transitions. [2021-12-06 18:33:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 18:33:06,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:06,688 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:06,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-06 18:33:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:06,889 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:33:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash 561035544, now seen corresponding path program 7 times [2021-12-06 18:33:06,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:06,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121030416] [2021-12-06 18:33:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:06,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 686 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:33:07,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121030416] [2021-12-06 18:33:07,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121030416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805295870] [2021-12-06 18:33:07,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:33:07,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:07,898 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:07,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 18:33:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 181 conjunts are in the unsatisfiable core [2021-12-06 18:33:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:08,106 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 18:33:08,728 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 14 treesize of output 10 [2021-12-06 18:33:08,792 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 17 treesize of output 19 [2021-12-06 18:33:11,574 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-06 18:33:11,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2021-12-06 18:33:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 680 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:33:11,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:12,874 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3448 (Array Int Int))) (let ((.cse0 (select v_ArrVal_3448 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3448) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= .cse0 0) (not (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) .cse0)) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10))))))) is different from false [2021-12-06 18:33:12,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:33:12,880 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 53 treesize of output 42 [2021-12-06 18:33:12,892 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 18:33:12,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 73 [2021-12-06 18:33:12,906 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-06 18:33:12,906 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 58 treesize of output 60 [2021-12-06 18:33:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 67 proven. 635 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:33:14,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805295870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:14,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:14,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 40, 41] total 109 [2021-12-06 18:33:14,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056251263] [2021-12-06 18:33:14,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:14,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-06 18:33:14,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-06 18:33:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=11189, Unknown=1, NotChecked=212, Total=11772 [2021-12-06 18:33:14,250 INFO L87 Difference]: Start difference. First operand 15632 states and 18125 transitions. Second operand has 109 states, 109 states have (on average 3.5688073394495414) internal successors, (389), 109 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 18:33:17,576 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)))) (and .cse0 (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (or (and .cse0 (= |c_ULTIMATE.start_main_~length1~0#1| 6)) (and .cse0 (= |c_ULTIMATE.start_main_~length1~0#1| 11))) (= 5 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_3448 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3448 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3448) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= .cse1 0) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) .cse1)) (not (= .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10))))))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (let ((.cse3 (<= 5 |c_ULTIMATE.start_main_~i~0#1|))) (or (and .cse3 (= |c_ULTIMATE.start_main_~length2~0#1| (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (and .cse0 .cse3 (<= |c_ULTIMATE.start_main_~i~0#1| 5)))) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse4 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) .cse5)) (= .cse5 0) (not (= (select .cse4 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) .cse5)))))) is different from false [2021-12-06 18:33:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:19,657 INFO L93 Difference]: Finished difference Result 25373 states and 29471 transitions. [2021-12-06 18:33:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 18:33:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.5688073394495414) internal successors, (389), 109 states have internal predecessors, (389), 0 states have call successors, (0), 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 154 [2021-12-06 18:33:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:19,672 INFO L225 Difference]: With dead ends: 25373 [2021-12-06 18:33:19,672 INFO L226 Difference]: Without dead ends: 25373 [2021-12-06 18:33:19,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=971, Invalid=29835, Unknown=2, NotChecked=698, Total=31506 [2021-12-06 18:33:19,673 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 439 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 4425 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 8317 SdHoareTripleChecker+Invalid, 6568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2114 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:19,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 8317 Invalid, 6568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 4425 Invalid, 0 Unknown, 2114 Unchecked, 1.4s Time] [2021-12-06 18:33:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25373 states. [2021-12-06 18:33:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25373 to 21481. [2021-12-06 18:33:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21481 states, 21479 states have (on average 1.1642068997625588) internal successors, (25006), 21480 states have internal predecessors, (25006), 0 states have call successors, (0), 0 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 18:33:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21481 states to 21481 states and 25006 transitions. [2021-12-06 18:33:19,860 INFO L78 Accepts]: Start accepts. Automaton has 21481 states and 25006 transitions. Word has length 154 [2021-12-06 18:33:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:19,860 INFO L470 AbstractCegarLoop]: Abstraction has 21481 states and 25006 transitions. [2021-12-06 18:33:19,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.5688073394495414) internal successors, (389), 109 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 18:33:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 21481 states and 25006 transitions. [2021-12-06 18:33:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 18:33:19,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:19,866 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:19,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-06 18:33:20,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:20,067 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:33:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1491861844, now seen corresponding path program 8 times [2021-12-06 18:33:20,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:20,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182736655] [2021-12-06 18:33:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:20,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:33:20,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182736655] [2021-12-06 18:33:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182736655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:20,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523945755] [2021-12-06 18:33:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:33:20,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:20,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:20,596 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:20,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 18:33:20,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:33:20,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:20,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 139 conjunts are in the unsatisfiable core [2021-12-06 18:33:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:20,805 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 18:33:21,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:33:21,307 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 17 treesize of output 19 [2021-12-06 18:33:21,535 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 18:33:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 23 proven. 680 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:33:21,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:21,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3518 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3518) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0)) is different from false [2021-12-06 18:33:21,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:33:21,773 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 23 treesize of output 24 [2021-12-06 18:33:21,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:33:21,777 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 37 treesize of output 37 [2021-12-06 18:33:21,779 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 11 treesize of output 7 [2021-12-06 18:33:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:33:22,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523945755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:22,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:22,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 54 [2021-12-06 18:33:22,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190162891] [2021-12-06 18:33:22,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:22,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 18:33:22,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 18:33:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2613, Unknown=1, NotChecked=102, Total=2862 [2021-12-06 18:33:22,032 INFO L87 Difference]: Start difference. First operand 21481 states and 25006 transitions. Second operand has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:23,999 INFO L93 Difference]: Finished difference Result 19465 states and 22455 transitions. [2021-12-06 18:33:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:33:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-06 18:33:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:24,006 INFO L225 Difference]: With dead ends: 19465 [2021-12-06 18:33:24,006 INFO L226 Difference]: Without dead ends: 10872 [2021-12-06 18:33:24,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 284 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=275, Invalid=5580, Unknown=1, NotChecked=150, Total=6006 [2021-12-06 18:33:24,007 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 191 mSDsluCounter, 6529 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 4972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:24,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 6700 Invalid, 4972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4452 Invalid, 0 Unknown, 506 Unchecked, 1.3s Time] [2021-12-06 18:33:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10872 states. [2021-12-06 18:33:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10872 to 9701. [2021-12-06 18:33:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9701 states, 9699 states have (on average 1.1568202907516238) internal successors, (11220), 9700 states have internal predecessors, (11220), 0 states have call successors, (0), 0 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 18:33:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9701 states to 9701 states and 11220 transitions. [2021-12-06 18:33:24,087 INFO L78 Accepts]: Start accepts. Automaton has 9701 states and 11220 transitions. Word has length 154 [2021-12-06 18:33:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:24,087 INFO L470 AbstractCegarLoop]: Abstraction has 9701 states and 11220 transitions. [2021-12-06 18:33:24,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9701 states and 11220 transitions. [2021-12-06 18:33:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 18:33:24,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:24,090 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:24,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-06 18:33:24,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:24,290 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:33:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1458914348, now seen corresponding path program 22 times [2021-12-06 18:33:24,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:24,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658500644] [2021-12-06 18:33:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:24,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 24 proven. 759 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:33:25,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658500644] [2021-12-06 18:33:25,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658500644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399133317] [2021-12-06 18:33:25,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:33:25,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:25,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:25,058 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:25,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 18:33:25,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:33:25,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 18:33:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:25,265 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:33:25,265 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:33:26,416 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 18:33:26,495 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:33:26,495 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 18:33:26,516 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 18:33:30,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:33:30,231 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 17 treesize of output 7 [2021-12-06 18:33:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 458 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:30,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:32,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:33:32,210 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 21 treesize of output 22 [2021-12-06 18:33:32,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:33:32,214 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 33 treesize of output 33 [2021-12-06 18:33:32,217 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 18:33:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 462 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:34,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399133317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:34,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:34,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38, 38] total 110 [2021-12-06 18:33:34,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881878714] [2021-12-06 18:33:34,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:34,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 18:33:34,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:34,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 18:33:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=11199, Unknown=8, NotChecked=0, Total=11990 [2021-12-06 18:33:34,465 INFO L87 Difference]: Start difference. First operand 9701 states and 11220 transitions. Second operand has 110 states, 110 states have (on average 4.127272727272727) internal successors, (454), 110 states have internal predecessors, (454), 0 states have call successors, (0), 0 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 18:33:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:49,258 INFO L93 Difference]: Finished difference Result 27921 states and 32447 transitions. [2021-12-06 18:33:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-12-06 18:33:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 4.127272727272727) internal successors, (454), 110 states have internal predecessors, (454), 0 states have call successors, (0), 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 157 [2021-12-06 18:33:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:49,276 INFO L225 Difference]: With dead ends: 27921 [2021-12-06 18:33:49,276 INFO L226 Difference]: Without dead ends: 27822 [2021-12-06 18:33:49,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 283 SyntacticMatches, 8 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17176 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=4056, Invalid=62758, Unknown=8, NotChecked=0, Total=66822 [2021-12-06 18:33:49,278 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1713 mSDsluCounter, 4992 mSDsCounter, 0 mSdLazyCounter, 4750 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 5098 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 4750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1513 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:49,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 5098 Invalid, 6556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 4750 Invalid, 0 Unknown, 1513 Unchecked, 1.6s Time] [2021-12-06 18:33:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27822 states. [2021-12-06 18:33:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27822 to 23378. [2021-12-06 18:33:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23378 states, 23376 states have (on average 1.1625171115674195) internal successors, (27175), 23377 states have internal predecessors, (27175), 0 states have call successors, (0), 0 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 18:33:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23378 states to 23378 states and 27175 transitions. [2021-12-06 18:33:49,476 INFO L78 Accepts]: Start accepts. Automaton has 23378 states and 27175 transitions. Word has length 157 [2021-12-06 18:33:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:49,476 INFO L470 AbstractCegarLoop]: Abstraction has 23378 states and 27175 transitions. [2021-12-06 18:33:49,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 4.127272727272727) internal successors, (454), 110 states have internal predecessors, (454), 0 states have call successors, (0), 0 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 18:33:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 23378 states and 27175 transitions. [2021-12-06 18:33:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 18:33:49,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:49,482 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:49,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-06 18:33:49,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:49,683 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:33:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:49,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1255557820, now seen corresponding path program 29 times [2021-12-06 18:33:49,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:49,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762240308] [2021-12-06 18:33:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:49,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 126 proven. 1020 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:33:50,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762240308] [2021-12-06 18:33:50,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762240308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208156264] [2021-12-06 18:33:50,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:33:50,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:50,283 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:50,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 18:33:50,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 18:33:50,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-06 18:33:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:50,599 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:33:50,600 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:33:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 698 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:52,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 698 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:53,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208156264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:53,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:53,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 117 [2021-12-06 18:33:53,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253271187] [2021-12-06 18:33:53,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:53,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-06 18:33:53,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-06 18:33:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1124, Invalid=12448, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 18:33:53,683 INFO L87 Difference]: Start difference. First operand 23378 states and 27175 transitions. Second operand has 117 states, 117 states have (on average 3.9572649572649574) internal successors, (463), 117 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 18:34:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:34:14,532 INFO L93 Difference]: Finished difference Result 38632 states and 43300 transitions. [2021-12-06 18:34:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-12-06 18:34:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.9572649572649574) internal successors, (463), 117 states have internal predecessors, (463), 0 states have call successors, (0), 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 161 [2021-12-06 18:34:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:34:14,555 INFO L225 Difference]: With dead ends: 38632 [2021-12-06 18:34:14,555 INFO L226 Difference]: Without dead ends: 38417 [2021-12-06 18:34:14,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23735 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=10200, Invalid=83130, Unknown=0, NotChecked=0, Total=93330 [2021-12-06 18:34:14,559 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 3471 mSDsluCounter, 29358 mSDsCounter, 0 mSdLazyCounter, 38208 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 29985 SdHoareTripleChecker+Invalid, 38571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 38208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:34:14,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 29985 Invalid, 38571 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [363 Valid, 38208 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-12-06 18:34:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38417 states. [2021-12-06 18:34:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38417 to 27614. [2021-12-06 18:34:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27614 states, 27612 states have (on average 1.1659061277705345) internal successors, (32193), 27613 states have internal predecessors, (32193), 0 states have call successors, (0), 0 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 18:34:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27614 states to 27614 states and 32193 transitions. [2021-12-06 18:34:14,811 INFO L78 Accepts]: Start accepts. Automaton has 27614 states and 32193 transitions. Word has length 161 [2021-12-06 18:34:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:34:14,811 INFO L470 AbstractCegarLoop]: Abstraction has 27614 states and 32193 transitions. [2021-12-06 18:34:14,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.9572649572649574) internal successors, (463), 117 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 18:34:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27614 states and 32193 transitions. [2021-12-06 18:34:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 18:34:14,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:34:14,820 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:34:14,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 18:34:15,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-06 18:34:15,021 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:34:15,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:34:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash -377177553, now seen corresponding path program 23 times [2021-12-06 18:34:15,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:34:15,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646371894] [2021-12-06 18:34:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:34:15,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:34:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 190 proven. 638 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:34:15,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:34:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646371894] [2021-12-06 18:34:15,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646371894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:34:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095835575] [2021-12-06 18:34:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:34:15,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:15,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:34:15,454 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:34:15,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 18:34:15,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-06 18:34:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:34:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 142 conjunts are in the unsatisfiable core [2021-12-06 18:34:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:34:15,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:15,710 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 9 treesize of output 11 [2021-12-06 18:34:15,712 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 18:34:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 231 proven. 597 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:34:16,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:34:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 276 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:34:18,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095835575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:34:18,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:34:18,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 82 [2021-12-06 18:34:18,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031620224] [2021-12-06 18:34:18,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:34:18,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 18:34:18,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:34:18,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 18:34:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=6089, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:34:18,254 INFO L87 Difference]: Start difference. First operand 27614 states and 32193 transitions. Second operand has 83 states, 82 states have (on average 5.7682926829268295) internal successors, (473), 83 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 18:34:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:34:21,092 INFO L93 Difference]: Finished difference Result 36304 states and 42250 transitions. [2021-12-06 18:34:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 18:34:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 5.7682926829268295) internal successors, (473), 83 states have internal predecessors, (473), 0 states have call successors, (0), 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 161 [2021-12-06 18:34:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:34:21,116 INFO L225 Difference]: With dead ends: 36304 [2021-12-06 18:34:21,117 INFO L226 Difference]: Without dead ends: 36304 [2021-12-06 18:34:21,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3342, Invalid=14748, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 18:34:21,117 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1009 mSDsluCounter, 3726 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 3885 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:34:21,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 3885 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 18:34:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36304 states. [2021-12-06 18:34:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36304 to 28339. [2021-12-06 18:34:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28339 states, 28337 states have (on average 1.1659667572431802) internal successors, (33040), 28338 states have internal predecessors, (33040), 0 states have call successors, (0), 0 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 18:34:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28339 states to 28339 states and 33040 transitions. [2021-12-06 18:34:21,404 INFO L78 Accepts]: Start accepts. Automaton has 28339 states and 33040 transitions. Word has length 161 [2021-12-06 18:34:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:34:21,405 INFO L470 AbstractCegarLoop]: Abstraction has 28339 states and 33040 transitions. [2021-12-06 18:34:21,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 5.7682926829268295) internal successors, (473), 83 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 18:34:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 28339 states and 33040 transitions. [2021-12-06 18:34:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 18:34:21,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:34:21,415 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:34:21,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-06 18:34:21,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-06 18:34:21,616 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:34:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:34:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1026030292, now seen corresponding path program 10 times [2021-12-06 18:34:21,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:34:21,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175603637] [2021-12-06 18:34:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:34:21,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:34:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 325 proven. 742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:34:22,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:34:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175603637] [2021-12-06 18:34:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175603637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:34:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118459189] [2021-12-06 18:34:22,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:34:22,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:22,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:34:22,276 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:34:22,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 18:34:22,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:34:22,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:34:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-06 18:34:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:34:22,443 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:34:22,443 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:34:22,707 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 16 treesize of output 12 [2021-12-06 18:34:23,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:34:23,902 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 21 treesize of output 21 [2021-12-06 18:34:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 392 proven. 675 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:34:24,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:34:25,878 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 13 [2021-12-06 18:34:25,880 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 26 treesize of output 22 [2021-12-06 18:34:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 435 proven. 632 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:34:28,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118459189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:34:28,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:34:28,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 41, 41] total 103 [2021-12-06 18:34:28,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422141787] [2021-12-06 18:34:28,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:34:28,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 18:34:28,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:34:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 18:34:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=9678, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 18:34:28,297 INFO L87 Difference]: Start difference. First operand 28339 states and 33040 transitions. Second operand has 104 states, 103 states have (on average 4.048543689320389) internal successors, (417), 104 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 18:34:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:34:38,557 INFO L93 Difference]: Finished difference Result 34713 states and 39664 transitions. [2021-12-06 18:34:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-06 18:34:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 4.048543689320389) internal successors, (417), 104 states have internal predecessors, (417), 0 states have call successors, (0), 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 163 [2021-12-06 18:34:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:34:38,577 INFO L225 Difference]: With dead ends: 34713 [2021-12-06 18:34:38,577 INFO L226 Difference]: Without dead ends: 32701 [2021-12-06 18:34:38,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6157 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=7648, Invalid=32954, Unknown=0, NotChecked=0, Total=40602 [2021-12-06 18:34:38,579 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 2289 mSDsluCounter, 5067 mSDsCounter, 0 mSdLazyCounter, 7612 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2289 SdHoareTripleChecker+Valid, 5190 SdHoareTripleChecker+Invalid, 8453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 7612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:34:38,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2289 Valid, 5190 Invalid, 8453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 7612 Invalid, 0 Unknown, 480 Unchecked, 3.0s Time] [2021-12-06 18:34:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32701 states. [2021-12-06 18:34:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32701 to 27037. [2021-12-06 18:34:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27037 states, 27035 states have (on average 1.1646014425744406) internal successors, (31485), 27036 states have internal predecessors, (31485), 0 states have call successors, (0), 0 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 18:34:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27037 states to 27037 states and 31485 transitions. [2021-12-06 18:34:38,811 INFO L78 Accepts]: Start accepts. Automaton has 27037 states and 31485 transitions. Word has length 163 [2021-12-06 18:34:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:34:38,812 INFO L470 AbstractCegarLoop]: Abstraction has 27037 states and 31485 transitions. [2021-12-06 18:34:38,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 4.048543689320389) internal successors, (417), 104 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 18:34:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27037 states and 31485 transitions. [2021-12-06 18:34:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 18:34:38,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:34:38,819 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:34:38,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 18:34:39,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-06 18:34:39,020 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:34:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:34:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1244185729, now seen corresponding path program 30 times [2021-12-06 18:34:39,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:34:39,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422526533] [2021-12-06 18:34:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:34:39,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:34:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 50 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:39,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:34:39,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422526533] [2021-12-06 18:34:39,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422526533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:34:39,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805023883] [2021-12-06 18:34:39,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:34:39,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:39,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:34:39,688 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:34:39,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 18:34:40,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-06 18:34:40,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:34:40,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 190 conjunts are in the unsatisfiable core [2021-12-06 18:34:40,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:34:40,867 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 14 treesize of output 10 [2021-12-06 18:34:41,151 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 18:34:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 50 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:41,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:34:41,366 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 13 [2021-12-06 18:34:41,367 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 26 treesize of output 22 [2021-12-06 18:34:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 50 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:41,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805023883] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:34:41,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:34:41,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 72 [2021-12-06 18:34:41,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691192606] [2021-12-06 18:34:41,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:34:41,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:34:41,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:34:41,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:34:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4905, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:34:41,567 INFO L87 Difference]: Start difference. First operand 27037 states and 31485 transitions. Second operand has 72 states, 72 states have (on average 3.5) internal successors, (252), 72 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:34:45,338 INFO L93 Difference]: Finished difference Result 32674 states and 38038 transitions. [2021-12-06 18:34:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 18:34:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.5) internal successors, (252), 72 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-12-06 18:34:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:34:45,359 INFO L225 Difference]: With dead ends: 32674 [2021-12-06 18:34:45,359 INFO L226 Difference]: Without dead ends: 32536 [2021-12-06 18:34:45,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=723, Invalid=11933, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 18:34:45,360 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 803 mSDsluCounter, 11484 mSDsCounter, 0 mSdLazyCounter, 8806 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 11777 SdHoareTripleChecker+Invalid, 9162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 8806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:34:45,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 11777 Invalid, 9162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 8806 Invalid, 0 Unknown, 303 Unchecked, 2.3s Time] [2021-12-06 18:34:45,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32536 states. [2021-12-06 18:34:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32536 to 28121. [2021-12-06 18:34:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28121 states, 28119 states have (on average 1.1650841068316797) internal successors, (32761), 28120 states have internal predecessors, (32761), 0 states have call successors, (0), 0 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 18:34:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28121 states to 28121 states and 32761 transitions. [2021-12-06 18:34:45,599 INFO L78 Accepts]: Start accepts. Automaton has 28121 states and 32761 transitions. Word has length 165 [2021-12-06 18:34:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:34:45,600 INFO L470 AbstractCegarLoop]: Abstraction has 28121 states and 32761 transitions. [2021-12-06 18:34:45,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.5) internal successors, (252), 72 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 28121 states and 32761 transitions. [2021-12-06 18:34:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 18:34:45,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:34:45,610 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:34:45,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-06 18:34:45,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:45,811 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:34:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:34:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1544590214, now seen corresponding path program 9 times [2021-12-06 18:34:45,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:34:45,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410185332] [2021-12-06 18:34:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:34:45,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:34:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 24 proven. 820 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:34:46,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:34:46,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410185332] [2021-12-06 18:34:46,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410185332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:34:46,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707107995] [2021-12-06 18:34:46,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:34:46,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:34:46,902 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:34:46,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 18:34:47,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 18:34:47,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:34:47,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 206 conjunts are in the unsatisfiable core [2021-12-06 18:34:47,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:34:47,559 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 18:34:48,257 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 14 treesize of output 10 [2021-12-06 18:34:48,326 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 25 treesize of output 24 [2021-12-06 18:34:51,739 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-06 18:34:51,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2021-12-06 18:34:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 24 proven. 814 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:34:51,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:34:55,317 INFO L354 Elim1Store]: treesize reduction 60, result has 41.2 percent of original size [2021-12-06 18:34:55,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 319 [2021-12-06 18:34:55,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:34:55,324 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 319 treesize of output 303 [2021-12-06 18:34:56,114 INFO L354 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2021-12-06 18:34:56,115 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 122 treesize of output 115 [2021-12-06 18:34:56,288 INFO L354 Elim1Store]: treesize reduction 21, result has 70.0 percent of original size [2021-12-06 18:34:56,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 220 [2021-12-06 18:34:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 69 proven. 769 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:34:58,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707107995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:34:58,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:34:58,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 47] total 121 [2021-12-06 18:34:58,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010156524] [2021-12-06 18:34:58,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:34:58,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-06 18:34:58,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:34:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-06 18:34:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=14093, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 18:34:58,802 INFO L87 Difference]: Start difference. First operand 28121 states and 32761 transitions. Second operand has 121 states, 121 states have (on average 3.3884297520661155) internal successors, (410), 121 states have internal predecessors, (410), 0 states have call successors, (0), 0 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 18:35:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:06,939 INFO L93 Difference]: Finished difference Result 37636 states and 43788 transitions. [2021-12-06 18:35:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 18:35:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.3884297520661155) internal successors, (410), 121 states have internal predecessors, (410), 0 states have call successors, (0), 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 166 [2021-12-06 18:35:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:06,963 INFO L225 Difference]: With dead ends: 37636 [2021-12-06 18:35:06,963 INFO L226 Difference]: Without dead ends: 37636 [2021-12-06 18:35:06,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7683 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1105, Invalid=36725, Unknown=0, NotChecked=0, Total=37830 [2021-12-06 18:35:06,964 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 640 mSDsluCounter, 9818 mSDsCounter, 0 mSdLazyCounter, 7676 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 9980 SdHoareTripleChecker+Invalid, 11267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 7676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3553 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:06,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 9980 Invalid, 11267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 7676 Invalid, 0 Unknown, 3553 Unchecked, 2.4s Time] [2021-12-06 18:35:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37636 states. [2021-12-06 18:35:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37636 to 21458. [2021-12-06 18:35:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21458 states, 21456 states have (on average 1.1640566741237883) internal successors, (24976), 21457 states have internal predecessors, (24976), 0 states have call successors, (0), 0 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 18:35:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21458 states to 21458 states and 24976 transitions. [2021-12-06 18:35:07,177 INFO L78 Accepts]: Start accepts. Automaton has 21458 states and 24976 transitions. Word has length 166 [2021-12-06 18:35:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:07,177 INFO L470 AbstractCegarLoop]: Abstraction has 21458 states and 24976 transitions. [2021-12-06 18:35:07,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.3884297520661155) internal successors, (410), 121 states have internal predecessors, (410), 0 states have call successors, (0), 0 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 18:35:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21458 states and 24976 transitions. [2021-12-06 18:35:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 18:35:07,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:07,183 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:07,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-06 18:35:07,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:07,384 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:35:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1973893214, now seen corresponding path program 10 times [2021-12-06 18:35:07,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707881243] [2021-12-06 18:35:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:07,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 24 proven. 815 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:35:07,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707881243] [2021-12-06 18:35:07,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707881243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467751390] [2021-12-06 18:35:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:35:07,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:07,937 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:07,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 18:35:08,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:35:08,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:35:08,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 18:35:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:08,128 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:35:08,129 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:35:09,214 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 18:35:09,313 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:35:09,313 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 18:35:09,336 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 18:35:15,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:35:15,413 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 17 treesize of output 7 [2021-12-06 18:35:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 462 proven. 383 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:35:15,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:17,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:35:17,161 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 21 treesize of output 22 [2021-12-06 18:35:17,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:35:17,166 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 33 treesize of output 33 [2021-12-06 18:35:17,168 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 18:35:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 459 proven. 386 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:35:19,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467751390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:19,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:19,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39, 39] total 103 [2021-12-06 18:35:19,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798266454] [2021-12-06 18:35:19,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:19,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-06 18:35:19,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-06 18:35:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=9712, Unknown=3, NotChecked=0, Total=10506 [2021-12-06 18:35:19,467 INFO L87 Difference]: Start difference. First operand 21458 states and 24976 transitions. Second operand has 103 states, 103 states have (on average 4.456310679611651) internal successors, (459), 103 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 18:35:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:30,401 INFO L93 Difference]: Finished difference Result 26381 states and 30583 transitions. [2021-12-06 18:35:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-12-06 18:35:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 4.456310679611651) internal successors, (459), 103 states have internal predecessors, (459), 0 states have call successors, (0), 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 166 [2021-12-06 18:35:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:30,414 INFO L225 Difference]: With dead ends: 26381 [2021-12-06 18:35:30,415 INFO L226 Difference]: Without dead ends: 18695 [2021-12-06 18:35:30,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 291 SyntacticMatches, 8 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12072 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=3803, Invalid=46594, Unknown=3, NotChecked=0, Total=50400 [2021-12-06 18:35:30,417 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1801 mSDsluCounter, 4827 mSDsCounter, 0 mSdLazyCounter, 4019 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 4939 SdHoareTripleChecker+Invalid, 5615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 4019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1327 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:30,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 4939 Invalid, 5615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 4019 Invalid, 0 Unknown, 1327 Unchecked, 1.3s Time] [2021-12-06 18:35:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18695 states. [2021-12-06 18:35:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18695 to 12752. [2021-12-06 18:35:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12752 states, 12750 states have (on average 1.1606274509803922) internal successors, (14798), 12751 states have internal predecessors, (14798), 0 states have call successors, (0), 0 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 18:35:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 14798 transitions. [2021-12-06 18:35:30,540 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 14798 transitions. Word has length 166 [2021-12-06 18:35:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:30,540 INFO L470 AbstractCegarLoop]: Abstraction has 12752 states and 14798 transitions. [2021-12-06 18:35:30,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 4.456310679611651) internal successors, (459), 103 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 18:35:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 14798 transitions. [2021-12-06 18:35:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-06 18:35:30,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:30,545 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:30,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-06 18:35:30,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:30,746 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:35:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash -509865278, now seen corresponding path program 31 times [2021-12-06 18:35:30,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:30,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752803131] [2021-12-06 18:35:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:30,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 435 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:31,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:31,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752803131] [2021-12-06 18:35:31,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752803131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:31,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143517950] [2021-12-06 18:35:31,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:35:31,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:31,351 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:31,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 18:35:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 171 conjunts are in the unsatisfiable core [2021-12-06 18:35:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 496 proven. 779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:32,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:33,166 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 18:35:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 496 proven. 779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:33,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143517950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:33,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:33,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 86 [2021-12-06 18:35:33,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657949350] [2021-12-06 18:35:33,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:33,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 18:35:33,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 18:35:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=6678, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 18:35:33,251 INFO L87 Difference]: Start difference. First operand 12752 states and 14798 transitions. Second operand has 87 states, 86 states have (on average 3.9651162790697674) internal successors, (341), 87 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 18:35:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:37,084 INFO L93 Difference]: Finished difference Result 16240 states and 18691 transitions. [2021-12-06 18:35:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 18:35:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.9651162790697674) internal successors, (341), 87 states have internal predecessors, (341), 0 states have call successors, (0), 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 169 [2021-12-06 18:35:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:37,094 INFO L225 Difference]: With dead ends: 16240 [2021-12-06 18:35:37,094 INFO L226 Difference]: Without dead ends: 16240 [2021-12-06 18:35:37,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3865, Invalid=16441, Unknown=0, NotChecked=0, Total=20306 [2021-12-06 18:35:37,095 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 1414 mSDsluCounter, 4356 mSDsCounter, 0 mSdLazyCounter, 6105 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 4530 SdHoareTripleChecker+Invalid, 6228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 6105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:37,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 4530 Invalid, 6228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 6105 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 18:35:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16240 states. [2021-12-06 18:35:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16240 to 14862. [2021-12-06 18:35:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14860 states have (on average 1.166150740242261) internal successors, (17329), 14861 states have internal predecessors, (17329), 0 states have call successors, (0), 0 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 18:35:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 17329 transitions. [2021-12-06 18:35:37,218 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 17329 transitions. Word has length 169 [2021-12-06 18:35:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:37,218 INFO L470 AbstractCegarLoop]: Abstraction has 14862 states and 17329 transitions. [2021-12-06 18:35:37,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.9651162790697674) internal successors, (341), 87 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 18:35:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 17329 transitions. [2021-12-06 18:35:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-06 18:35:37,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:37,223 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:37,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 18:35:37,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:37,424 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:35:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash -822897350, now seen corresponding path program 24 times [2021-12-06 18:35:37,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:37,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929603401] [2021-12-06 18:35:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:37,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:35:38,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:38,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929603401] [2021-12-06 18:35:38,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929603401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:38,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755477700] [2021-12-06 18:35:38,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:35:38,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:38,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:38,184 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:38,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 18:35:38,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-06 18:35:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:35:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 163 conjunts are in the unsatisfiable core [2021-12-06 18:35:38,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:38,771 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 18:35:39,320 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 14 treesize of output 10 [2021-12-06 18:35:39,378 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 17 treesize of output 19 [2021-12-06 18:35:39,987 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 18:35:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:35:40,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:40,328 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4224 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4224) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)) 0)) is different from false [2021-12-06 18:35:40,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:35:40,332 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 23 treesize of output 24 [2021-12-06 18:35:40,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:35:40,336 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 37 treesize of output 37 [2021-12-06 18:35:40,338 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 11 treesize of output 7 [2021-12-06 18:35:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:35:40,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755477700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:40,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:40,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 36, 36] total 81 [2021-12-06 18:35:40,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401393622] [2021-12-06 18:35:40,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:40,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:35:40,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:35:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=6116, Unknown=1, NotChecked=156, Total=6480 [2021-12-06 18:35:40,653 INFO L87 Difference]: Start difference. First operand 14862 states and 17329 transitions. Second operand has 81 states, 81 states have (on average 4.148148148148148) internal successors, (336), 81 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 18:35:46,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:46,491 INFO L93 Difference]: Finished difference Result 36197 states and 42211 transitions. [2021-12-06 18:35:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-06 18:35:46,492 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.148148148148148) internal successors, (336), 81 states have internal predecessors, (336), 0 states have call successors, (0), 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 169 [2021-12-06 18:35:46,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:46,510 INFO L225 Difference]: With dead ends: 36197 [2021-12-06 18:35:46,510 INFO L226 Difference]: Without dead ends: 27753 [2021-12-06 18:35:46,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 299 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=871, Invalid=20594, Unknown=1, NotChecked=290, Total=21756 [2021-12-06 18:35:46,511 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 1217 mSDsluCounter, 15035 mSDsCounter, 0 mSdLazyCounter, 11762 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 15372 SdHoareTripleChecker+Invalid, 12554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 11762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:46,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 15372 Invalid, 12554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 11762 Invalid, 0 Unknown, 671 Unchecked, 3.2s Time] [2021-12-06 18:35:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27753 states. [2021-12-06 18:35:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27753 to 15210. [2021-12-06 18:35:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15210 states, 15208 states have (on average 1.165965281430826) internal successors, (17732), 15209 states have internal predecessors, (17732), 0 states have call successors, (0), 0 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 18:35:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15210 states to 15210 states and 17732 transitions. [2021-12-06 18:35:46,695 INFO L78 Accepts]: Start accepts. Automaton has 15210 states and 17732 transitions. Word has length 169 [2021-12-06 18:35:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:46,695 INFO L470 AbstractCegarLoop]: Abstraction has 15210 states and 17732 transitions. [2021-12-06 18:35:46,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.148148148148148) internal successors, (336), 81 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 18:35:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15210 states and 17732 transitions. [2021-12-06 18:35:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 18:35:46,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:46,701 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 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] [2021-12-06 18:35:46,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-06 18:35:46,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-12-06 18:35:46,902 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:35:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash 864755389, now seen corresponding path program 25 times [2021-12-06 18:35:46,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:46,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238618927] [2021-12-06 18:35:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:46,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 231 proven. 744 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:35:47,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:47,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238618927] [2021-12-06 18:35:47,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238618927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:47,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758054811] [2021-12-06 18:35:47,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:35:47,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:47,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:47,360 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:47,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-06 18:35:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 18:35:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 276 proven. 699 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:35:48,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:48,811 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 18:35:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 276 proven. 699 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:35:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758054811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:48,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:48,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 66 [2021-12-06 18:35:48,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170561703] [2021-12-06 18:35:48,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:48,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 18:35:48,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 18:35:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3924, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:35:48,885 INFO L87 Difference]: Start difference. First operand 15210 states and 17732 transitions. Second operand has 67 states, 66 states have (on average 5.257575757575758) internal successors, (347), 67 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:51,453 INFO L93 Difference]: Finished difference Result 28476 states and 33370 transitions. [2021-12-06 18:35:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 18:35:51,453 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 5.257575757575758) internal successors, (347), 67 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-06 18:35:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:51,473 INFO L225 Difference]: With dead ends: 28476 [2021-12-06 18:35:51,474 INFO L226 Difference]: Without dead ends: 28476 [2021-12-06 18:35:51,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2273, Invalid=9937, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 18:35:51,474 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 1191 mSDsluCounter, 5287 mSDsCounter, 0 mSdLazyCounter, 4234 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 5479 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 4234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:51,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 5479 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 4234 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 18:35:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28476 states. [2021-12-06 18:35:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28476 to 16040. [2021-12-06 18:35:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16040 states, 16038 states have (on average 1.1662302032672403) internal successors, (18704), 16039 states have internal predecessors, (18704), 0 states have call successors, (0), 0 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 18:35:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16040 states to 16040 states and 18704 transitions. [2021-12-06 18:35:51,657 INFO L78 Accepts]: Start accepts. Automaton has 16040 states and 18704 transitions. Word has length 173 [2021-12-06 18:35:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:51,657 INFO L470 AbstractCegarLoop]: Abstraction has 16040 states and 18704 transitions. [2021-12-06 18:35:51,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 5.257575757575758) internal successors, (347), 67 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16040 states and 18704 transitions. [2021-12-06 18:35:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-06 18:35:51,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:51,663 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:51,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-06 18:35:51,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:51,864 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:35:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1026691409, now seen corresponding path program 32 times [2021-12-06 18:35:51,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:51,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600568979] [2021-12-06 18:35:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:51,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:52,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600568979] [2021-12-06 18:35:52,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600568979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:52,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202336882] [2021-12-06 18:35:52,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:35:52,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:52,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:52,660 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:52,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-06 18:35:52,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:35:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:35:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 200 conjunts are in the unsatisfiable core [2021-12-06 18:35:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:53,322 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 14 treesize of output 10 [2021-12-06 18:35:53,622 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 18:35:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:53,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:53,809 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 13 [2021-12-06 18:35:53,810 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 26 treesize of output 22 [2021-12-06 18:35:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:53,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202336882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:53,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:53,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 75 [2021-12-06 18:35:53,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746969055] [2021-12-06 18:35:53,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:53,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 18:35:53,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 18:35:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5335, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 18:35:53,999 INFO L87 Difference]: Start difference. First operand 16040 states and 18704 transitions. Second operand has 75 states, 75 states have (on average 3.533333333333333) internal successors, (265), 75 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 18:35:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:58,431 INFO L93 Difference]: Finished difference Result 20055 states and 23132 transitions. [2021-12-06 18:35:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 18:35:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.533333333333333) internal successors, (265), 75 states have internal predecessors, (265), 0 states have call successors, (0), 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 174 [2021-12-06 18:35:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:58,444 INFO L225 Difference]: With dead ends: 20055 [2021-12-06 18:35:58,444 INFO L226 Difference]: Without dead ends: 18152 [2021-12-06 18:35:58,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 317 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=838, Invalid=12968, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 18:35:58,445 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 1180 mSDsluCounter, 13885 mSDsCounter, 0 mSdLazyCounter, 11179 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 14194 SdHoareTripleChecker+Invalid, 11652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 11179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:58,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 14194 Invalid, 11652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 11179 Invalid, 0 Unknown, 326 Unchecked, 2.8s Time] [2021-12-06 18:35:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18152 states. [2021-12-06 18:35:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18152 to 17333. [2021-12-06 18:35:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17333 states, 17331 states have (on average 1.166868616929202) internal successors, (20223), 17332 states have internal predecessors, (20223), 0 states have call successors, (0), 0 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 18:35:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17333 states to 17333 states and 20223 transitions. [2021-12-06 18:35:58,579 INFO L78 Accepts]: Start accepts. Automaton has 17333 states and 20223 transitions. Word has length 174 [2021-12-06 18:35:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:58,579 INFO L470 AbstractCegarLoop]: Abstraction has 17333 states and 20223 transitions. [2021-12-06 18:35:58,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.533333333333333) internal successors, (265), 75 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 18:35:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 17333 states and 20223 transitions. [2021-12-06 18:35:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-06 18:35:58,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:58,584 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:58,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-06 18:35:58,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-12-06 18:35:58,785 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:35:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1496115215, now seen corresponding path program 11 times [2021-12-06 18:35:58,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:58,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941580807] [2021-12-06 18:35:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:58,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 53 proven. 1244 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:35:59,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:59,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941580807] [2021-12-06 18:35:59,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941580807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:59,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908188655] [2021-12-06 18:35:59,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:35:59,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:59,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:59,425 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:59,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-06 18:35:59,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 18:35:59,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:35:59,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 190 conjunts are in the unsatisfiable core [2021-12-06 18:35:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:00,242 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 14 treesize of output 10 [2021-12-06 18:36:00,567 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 18:36:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 53 proven. 1244 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:36:00,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:00,782 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 13 [2021-12-06 18:36:00,783 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 26 treesize of output 22 [2021-12-06 18:36:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 53 proven. 1244 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:36:00,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908188655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:00,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:00,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 72 [2021-12-06 18:36:00,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244384422] [2021-12-06 18:36:00,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:00,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:36:00,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:36:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4905, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:36:00,983 INFO L87 Difference]: Start difference. First operand 17333 states and 20223 transitions. Second operand has 72 states, 72 states have (on average 3.861111111111111) internal successors, (278), 72 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 18:36:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:05,004 INFO L93 Difference]: Finished difference Result 18531 states and 21332 transitions. [2021-12-06 18:36:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 18:36:05,004 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.861111111111111) internal successors, (278), 72 states have internal predecessors, (278), 0 states have call successors, (0), 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 177 [2021-12-06 18:36:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:05,015 INFO L225 Difference]: With dead ends: 18531 [2021-12-06 18:36:05,015 INFO L226 Difference]: Without dead ends: 15863 [2021-12-06 18:36:05,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 324 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=721, Invalid=12161, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 18:36:05,016 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 1140 mSDsluCounter, 11443 mSDsCounter, 0 mSdLazyCounter, 9183 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 11734 SdHoareTripleChecker+Invalid, 9575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 9183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:05,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 11734 Invalid, 9575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 9183 Invalid, 0 Unknown, 220 Unchecked, 2.5s Time] [2021-12-06 18:36:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15863 states. [2021-12-06 18:36:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15863 to 15217. [2021-12-06 18:36:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15217 states, 15215 states have (on average 1.1618797239566216) internal successors, (17678), 15216 states have internal predecessors, (17678), 0 states have call successors, (0), 0 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 18:36:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15217 states to 15217 states and 17678 transitions. [2021-12-06 18:36:05,131 INFO L78 Accepts]: Start accepts. Automaton has 15217 states and 17678 transitions. Word has length 177 [2021-12-06 18:36:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 15217 states and 17678 transitions. [2021-12-06 18:36:05,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.861111111111111) internal successors, (278), 72 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 18:36:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 15217 states and 17678 transitions. [2021-12-06 18:36:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 18:36:05,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:05,135 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:05,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-06 18:36:05,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-12-06 18:36:05,337 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:36:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash 818123468, now seen corresponding path program 33 times [2021-12-06 18:36:05,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:05,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538085994] [2021-12-06 18:36:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:05,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 496 proven. 935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:06,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538085994] [2021-12-06 18:36:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538085994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544987681] [2021-12-06 18:36:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:36:06,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:06,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:06,053 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:06,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-06 18:36:06,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-06 18:36:06,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-06 18:36:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:08,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:09,272 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 18:36:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:09,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544987681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:09,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:09,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 108 [2021-12-06 18:36:09,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413958692] [2021-12-06 18:36:09,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:09,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-06 18:36:09,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:09,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-06 18:36:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1432, Invalid=10340, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 18:36:09,366 INFO L87 Difference]: Start difference. First operand 15217 states and 17678 transitions. Second operand has 109 states, 108 states have (on average 4.157407407407407) internal successors, (449), 109 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 18:36:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:14,637 INFO L93 Difference]: Finished difference Result 16827 states and 19297 transitions. [2021-12-06 18:36:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 18:36:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 4.157407407407407) internal successors, (449), 109 states have internal predecessors, (449), 0 states have call successors, (0), 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 178 [2021-12-06 18:36:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:14,649 INFO L225 Difference]: With dead ends: 16827 [2021-12-06 18:36:14,649 INFO L226 Difference]: Without dead ends: 16827 [2021-12-06 18:36:14,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5954 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6470, Invalid=27202, Unknown=0, NotChecked=0, Total=33672 [2021-12-06 18:36:14,650 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 2106 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 4330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 4102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:14,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2106 Valid, 3404 Invalid, 4330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 18:36:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16827 states. [2021-12-06 18:36:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16827 to 15352. [2021-12-06 18:36:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15352 states, 15350 states have (on average 1.1621498371335506) internal successors, (17839), 15351 states have internal predecessors, (17839), 0 states have call successors, (0), 0 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 18:36:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15352 states to 15352 states and 17839 transitions. [2021-12-06 18:36:14,777 INFO L78 Accepts]: Start accepts. Automaton has 15352 states and 17839 transitions. Word has length 178 [2021-12-06 18:36:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:14,777 INFO L470 AbstractCegarLoop]: Abstraction has 15352 states and 17839 transitions. [2021-12-06 18:36:14,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 4.157407407407407) internal successors, (449), 109 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 18:36:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 15352 states and 17839 transitions. [2021-12-06 18:36:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-06 18:36:14,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:14,782 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:14,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-06 18:36:14,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:14,983 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:36:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:14,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1404335160, now seen corresponding path program 26 times [2021-12-06 18:36:14,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523601884] [2021-12-06 18:36:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:14,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 28 proven. 1053 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:36:15,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523601884] [2021-12-06 18:36:15,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523601884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607770274] [2021-12-06 18:36:15,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:36:15,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:15,864 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:15,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-06 18:36:16,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:36:16,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:16,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 209 conjunts are in the unsatisfiable core [2021-12-06 18:36:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:16,076 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 18:36:16,676 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 14 treesize of output 10 [2021-12-06 18:36:16,734 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 17 treesize of output 19 [2021-12-06 18:36:19,106 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 18:36:19,107 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-06 18:36:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 28 proven. 1053 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:36:19,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:20,262 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (v_ArrVal_4643 (Array Int Int))) (let ((.cse0 (select v_ArrVal_4643 |ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4643) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) .cse0))))) is different from false [2021-12-06 18:36:20,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:36:20,267 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 26 treesize of output 27 [2021-12-06 18:36:20,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:36:20,272 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 44 treesize of output 44 [2021-12-06 18:36:20,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:36:20,276 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 32 treesize of output 32 [2021-12-06 18:36:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 33 proven. 1048 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:36:20,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607770274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:20,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:20,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 46] total 100 [2021-12-06 18:36:20,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389487806] [2021-12-06 18:36:20,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:20,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-06 18:36:20,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:20,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-06 18:36:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=9379, Unknown=2, NotChecked=194, Total=9900 [2021-12-06 18:36:20,619 INFO L87 Difference]: Start difference. First operand 15352 states and 17839 transitions. Second operand has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 18:36:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:23,008 INFO L93 Difference]: Finished difference Result 17515 states and 20241 transitions. [2021-12-06 18:36:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 18:36:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 states have internal predecessors, (379), 0 states have call successors, (0), 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 181 [2021-12-06 18:36:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:23,019 INFO L225 Difference]: With dead ends: 17515 [2021-12-06 18:36:23,019 INFO L226 Difference]: Without dead ends: 17400 [2021-12-06 18:36:23,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 308 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2765 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=461, Invalid=13821, Unknown=2, NotChecked=236, Total=14520 [2021-12-06 18:36:23,020 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 283 mSDsluCounter, 5387 mSDsCounter, 0 mSdLazyCounter, 4614 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 5478 SdHoareTripleChecker+Invalid, 6748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2114 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:23,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 5478 Invalid, 6748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4614 Invalid, 0 Unknown, 2114 Unchecked, 1.4s Time] [2021-12-06 18:36:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2021-12-06 18:36:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 17385. [2021-12-06 18:36:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17385 states, 17383 states have (on average 1.1569349364321464) internal successors, (20111), 17384 states have internal predecessors, (20111), 0 states have call successors, (0), 0 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 18:36:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17385 states to 17385 states and 20111 transitions. [2021-12-06 18:36:23,169 INFO L78 Accepts]: Start accepts. Automaton has 17385 states and 20111 transitions. Word has length 181 [2021-12-06 18:36:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:23,170 INFO L470 AbstractCegarLoop]: Abstraction has 17385 states and 20111 transitions. [2021-12-06 18:36:23,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 18:36:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 17385 states and 20111 transitions. [2021-12-06 18:36:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 18:36:23,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:23,174 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:23,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-12-06 18:36:23,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:23,376 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:36:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1365697765, now seen corresponding path program 34 times [2021-12-06 18:36:23,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:23,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965441809] [2021-12-06 18:36:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:23,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 56 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:24,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965441809] [2021-12-06 18:36:24,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965441809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249141657] [2021-12-06 18:36:24,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:36:24,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:24,175 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:24,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-06 18:36:24,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:36:24,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 155 conjunts are in the unsatisfiable core [2021-12-06 18:36:24,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:24,372 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:36:24,372 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:36:25,443 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 18:36:27,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:27,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 18:36:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 822 proven. 701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:27,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:29,363 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 13 treesize of output 11 [2021-12-06 18:36:29,365 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 18:36:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 821 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:31,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249141657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:31,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:31,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 137 [2021-12-06 18:36:31,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226675136] [2021-12-06 18:36:31,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:31,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-12-06 18:36:31,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-12-06 18:36:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=17145, Unknown=0, NotChecked=0, Total=18632 [2021-12-06 18:36:31,485 INFO L87 Difference]: Start difference. First operand 17385 states and 20111 transitions. Second operand has 137 states, 137 states have (on average 3.875912408759124) internal successors, (531), 137 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 18:36:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:39,086 INFO L93 Difference]: Finished difference Result 19643 states and 22605 transitions. [2021-12-06 18:36:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-06 18:36:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.875912408759124) internal successors, (531), 137 states have internal predecessors, (531), 0 states have call successors, (0), 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 183 [2021-12-06 18:36:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:39,097 INFO L225 Difference]: With dead ends: 19643 [2021-12-06 18:36:39,097 INFO L226 Difference]: Without dead ends: 19491 [2021-12-06 18:36:39,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19112 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=5490, Invalid=61850, Unknown=0, NotChecked=0, Total=67340 [2021-12-06 18:36:39,099 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 951 mSDsluCounter, 6918 mSDsCounter, 0 mSdLazyCounter, 5543 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 7070 SdHoareTripleChecker+Invalid, 6525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 5543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:39,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 7070 Invalid, 6525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 5543 Invalid, 0 Unknown, 830 Unchecked, 1.6s Time] [2021-12-06 18:36:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19491 states. [2021-12-06 18:36:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19491 to 18704. [2021-12-06 18:36:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18702 states have (on average 1.1584857234520372) internal successors, (21666), 18703 states have internal predecessors, (21666), 0 states have call successors, (0), 0 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 18:36:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 21666 transitions. [2021-12-06 18:36:39,272 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 21666 transitions. Word has length 183 [2021-12-06 18:36:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:39,272 INFO L470 AbstractCegarLoop]: Abstraction has 18704 states and 21666 transitions. [2021-12-06 18:36:39,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.875912408759124) internal successors, (531), 137 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 18:36:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 21666 transitions. [2021-12-06 18:36:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-06 18:36:39,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:39,293 INFO L514 BasicCegarLoop]: trace histogram [15, 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] [2021-12-06 18:36:39,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-12-06 18:36:39,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-12-06 18:36:39,494 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:36:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash 300542155, now seen corresponding path program 27 times [2021-12-06 18:36:39,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:39,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914557550] [2021-12-06 18:36:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:39,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 276 proven. 858 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:36:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914557550] [2021-12-06 18:36:39,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914557550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861356836] [2021-12-06 18:36:39,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:36:39,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:39,971 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:39,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-06 18:36:40,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-06 18:36:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-06 18:36:40,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 325 proven. 809 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:36:41,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:42,239 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 18:36:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 325 proven. 809 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:36:42,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861356836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:42,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:42,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 85 [2021-12-06 18:36:42,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553749439] [2021-12-06 18:36:42,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:42,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 18:36:42,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 18:36:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=6284, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 18:36:42,314 INFO L87 Difference]: Start difference. First operand 18704 states and 21666 transitions. Second operand has 86 states, 85 states have (on average 5.682352941176471) internal successors, (483), 86 states have internal predecessors, (483), 0 states have call successors, (0), 0 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 18:36:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:44,724 INFO L93 Difference]: Finished difference Result 40162 states and 46783 transitions. [2021-12-06 18:36:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 18:36:44,724 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 5.682352941176471) internal successors, (483), 86 states have internal predecessors, (483), 0 states have call successors, (0), 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 185 [2021-12-06 18:36:44,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:44,753 INFO L225 Difference]: With dead ends: 40162 [2021-12-06 18:36:44,753 INFO L226 Difference]: Without dead ends: 40162 [2021-12-06 18:36:44,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3315, Invalid=14241, Unknown=0, NotChecked=0, Total=17556 [2021-12-06 18:36:44,754 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 1226 mSDsluCounter, 3673 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 3890 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:44,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 3890 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 18:36:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40162 states. [2021-12-06 18:36:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40162 to 19705. [2021-12-06 18:36:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19705 states, 19703 states have (on average 1.1591635791503831) internal successors, (22839), 19704 states have internal predecessors, (22839), 0 states have call successors, (0), 0 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 18:36:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19705 states to 19705 states and 22839 transitions. [2021-12-06 18:36:45,033 INFO L78 Accepts]: Start accepts. Automaton has 19705 states and 22839 transitions. Word has length 185 [2021-12-06 18:36:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:45,033 INFO L470 AbstractCegarLoop]: Abstraction has 19705 states and 22839 transitions. [2021-12-06 18:36:45,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 5.682352941176471) internal successors, (483), 86 states have internal predecessors, (483), 0 states have call successors, (0), 0 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 18:36:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 19705 states and 22839 transitions. [2021-12-06 18:36:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-06 18:36:45,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:45,039 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:45,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-12-06 18:36:45,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-06 18:36:45,240 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:36:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2145096040, now seen corresponding path program 35 times [2021-12-06 18:36:45,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:45,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889888986] [2021-12-06 18:36:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:45,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 561 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:45,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889888986] [2021-12-06 18:36:45,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889888986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924054241] [2021-12-06 18:36:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:36:45,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:45,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:45,996 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:45,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-06 18:36:46,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-06 18:36:46,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 197 conjunts are in the unsatisfiable core [2021-12-06 18:36:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:46,402 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:36:46,403 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:36:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:48,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 703 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924054241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:51,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:51,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 127 [2021-12-06 18:36:51,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505627530] [2021-12-06 18:36:51,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:51,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-06 18:36:51,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-06 18:36:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1825, Invalid=14431, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 18:36:51,031 INFO L87 Difference]: Start difference. First operand 19705 states and 22839 transitions. Second operand has 128 states, 127 states have (on average 4.25984251968504) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 0 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 18:36:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:56,394 INFO L93 Difference]: Finished difference Result 24165 states and 27821 transitions. [2021-12-06 18:36:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 18:36:56,394 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 4.25984251968504) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 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 187 [2021-12-06 18:36:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:56,409 INFO L225 Difference]: With dead ends: 24165 [2021-12-06 18:36:56,409 INFO L226 Difference]: Without dead ends: 24165 [2021-12-06 18:36:56,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9554 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8289, Invalid=33941, Unknown=0, NotChecked=0, Total=42230 [2021-12-06 18:36:56,412 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1507 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 6588 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 4720 SdHoareTripleChecker+Invalid, 6685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:56,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 4720 Invalid, 6685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6588 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 18:36:56,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24165 states. [2021-12-06 18:36:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24165 to 22454. [2021-12-06 18:36:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22454 states, 22452 states have (on average 1.163727062177089) internal successors, (26128), 22453 states have internal predecessors, (26128), 0 states have call successors, (0), 0 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 18:36:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22454 states to 22454 states and 26128 transitions. [2021-12-06 18:36:56,606 INFO L78 Accepts]: Start accepts. Automaton has 22454 states and 26128 transitions. Word has length 187 [2021-12-06 18:36:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:56,606 INFO L470 AbstractCegarLoop]: Abstraction has 22454 states and 26128 transitions. [2021-12-06 18:36:56,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 4.25984251968504) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 0 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 18:36:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 22454 states and 26128 transitions. [2021-12-06 18:36:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 18:36:56,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:56,615 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:56,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-06 18:36:56,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-06 18:36:56,816 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:36:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash 893526528, now seen corresponding path program 11 times [2021-12-06 18:36:56,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:56,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535592623] [2021-12-06 18:36:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:56,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 33 proven. 1118 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:36:57,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:57,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535592623] [2021-12-06 18:36:57,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535592623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:57,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873306624] [2021-12-06 18:36:57,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:36:57,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:57,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:57,931 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:57,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-06 18:36:58,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 18:36:58,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 210 conjunts are in the unsatisfiable core [2021-12-06 18:36:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:58,447 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:36:58,447 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:36:59,798 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 14 treesize of output 10 [2021-12-06 18:36:59,896 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:36:59,896 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 17 treesize of output 23 [2021-12-06 18:36:59,902 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 8 treesize of output 3 [2021-12-06 18:37:01,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:37:01,518 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 18:37:04,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:37:04,561 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 14 [2021-12-06 18:37:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:37:04,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:37:06,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:37:06,412 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 26 treesize of output 27 [2021-12-06 18:37:06,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:37:06,417 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 44 treesize of output 44 [2021-12-06 18:37:06,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:37:06,422 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 32 treesize of output 32 [2021-12-06 18:37:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:37:09,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873306624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:37:09,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:37:09,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 50] total 136 [2021-12-06 18:37:09,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863610925] [2021-12-06 18:37:09,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:37:09,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-06 18:37:09,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:37:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-06 18:37:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=17939, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 18:37:09,577 INFO L87 Difference]: Start difference. First operand 22454 states and 26128 transitions. Second operand has 136 states, 136 states have (on average 3.713235294117647) internal successors, (505), 136 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 18:37:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:37:17,341 INFO L93 Difference]: Finished difference Result 25107 states and 29136 transitions. [2021-12-06 18:37:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-06 18:37:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.713235294117647) internal successors, (505), 136 states have internal predecessors, (505), 0 states have call successors, (0), 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 190 [2021-12-06 18:37:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:37:17,360 INFO L225 Difference]: With dead ends: 25107 [2021-12-06 18:37:17,360 INFO L226 Difference]: Without dead ends: 25107 [2021-12-06 18:37:17,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 296 SyntacticMatches, 8 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6547 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=945, Invalid=38457, Unknown=0, NotChecked=0, Total=39402 [2021-12-06 18:37:17,362 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 401 mSDsluCounter, 5454 mSDsCounter, 0 mSdLazyCounter, 6765 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 5517 SdHoareTripleChecker+Invalid, 10861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 6765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4084 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:37:17,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 5517 Invalid, 10861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 6765 Invalid, 0 Unknown, 4084 Unchecked, 2.2s Time] [2021-12-06 18:37:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25107 states. [2021-12-06 18:37:17,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25107 to 23231. [2021-12-06 18:37:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23231 states, 23229 states have (on average 1.1642774118558699) internal successors, (27045), 23230 states have internal predecessors, (27045), 0 states have call successors, (0), 0 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 18:37:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23231 states to 23231 states and 27045 transitions. [2021-12-06 18:37:17,544 INFO L78 Accepts]: Start accepts. Automaton has 23231 states and 27045 transitions. Word has length 190 [2021-12-06 18:37:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:37:17,545 INFO L470 AbstractCegarLoop]: Abstraction has 23231 states and 27045 transitions. [2021-12-06 18:37:17,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.713235294117647) internal successors, (505), 136 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 18:37:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 23231 states and 27045 transitions. [2021-12-06 18:37:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 18:37:17,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:37:17,554 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:37:17,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-12-06 18:37:17,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-06 18:37:17,755 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:37:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:37:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 670204362, now seen corresponding path program 12 times [2021-12-06 18:37:17,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:37:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201781018] [2021-12-06 18:37:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:37:17,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:37:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:37:18,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:37:18,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201781018] [2021-12-06 18:37:18,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201781018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:37:18,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554472126] [2021-12-06 18:37:18,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:37:18,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:37:18,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:37:18,958 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:37:18,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-06 18:37:19,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 18:37:19,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:37:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 181 conjunts are in the unsatisfiable core [2021-12-06 18:37:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:37:19,744 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:37:19,745 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:37:20,739 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 14 treesize of output 10 [2021-12-06 18:37:20,815 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:37:20,815 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 17 treesize of output 23 [2021-12-06 18:37:20,825 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 8 treesize of output 3 [2021-12-06 18:37:29,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:37:29,423 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 22 treesize of output 11 [2021-12-06 18:37:29,430 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:37:29,430 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 18:37:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:37:29,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:37:31,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:37:31,548 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 23 treesize of output 24 [2021-12-06 18:37:31,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:37:31,552 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 37 treesize of output 37 [2021-12-06 18:37:31,554 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 11 treesize of output 7 [2021-12-06 18:37:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:37:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554472126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:37:33,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:37:33,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 43, 43] total 128 [2021-12-06 18:37:33,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273105408] [2021-12-06 18:37:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:37:33,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-06 18:37:33,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:37:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-06 18:37:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=15896, Unknown=1, NotChecked=0, Total=16256 [2021-12-06 18:37:33,829 INFO L87 Difference]: Start difference. First operand 23231 states and 27045 transitions. Second operand has 128 states, 128 states have (on average 4.2265625) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 0 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 18:37:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:37:44,732 INFO L93 Difference]: Finished difference Result 23653 states and 27500 transitions. [2021-12-06 18:37:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 18:37:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 4.2265625) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 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 190 [2021-12-06 18:37:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:37:44,748 INFO L225 Difference]: With dead ends: 23653 [2021-12-06 18:37:44,749 INFO L226 Difference]: Without dead ends: 23114 [2021-12-06 18:37:44,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6199 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1070, Invalid=41571, Unknown=1, NotChecked=0, Total=42642 [2021-12-06 18:37:44,751 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 887 mSDsluCounter, 5995 mSDsCounter, 0 mSdLazyCounter, 9660 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 6071 SdHoareTripleChecker+Invalid, 11735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 9660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1860 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:37:44,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 6071 Invalid, 11735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 9660 Invalid, 0 Unknown, 1860 Unchecked, 3.1s Time] [2021-12-06 18:37:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23114 states. [2021-12-06 18:37:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23114 to 23111. [2021-12-06 18:37:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23111 states, 23109 states have (on average 1.1645246440780648) internal successors, (26911), 23110 states have internal predecessors, (26911), 0 states have call successors, (0), 0 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 18:37:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23111 states to 23111 states and 26911 transitions. [2021-12-06 18:37:44,938 INFO L78 Accepts]: Start accepts. Automaton has 23111 states and 26911 transitions. Word has length 190 [2021-12-06 18:37:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:37:44,938 INFO L470 AbstractCegarLoop]: Abstraction has 23111 states and 26911 transitions. [2021-12-06 18:37:44,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 4.2265625) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 0 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 18:37:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23111 states and 26911 transitions. [2021-12-06 18:37:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-06 18:37:44,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:37:44,947 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:37:44,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-06 18:37:45,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-06 18:37:45,148 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:37:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:37:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1372694473, now seen corresponding path program 36 times [2021-12-06 18:37:45,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:37:45,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105736010] [2021-12-06 18:37:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:37:45,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:37:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:37:45,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:37:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105736010] [2021-12-06 18:37:45,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105736010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:37:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294282596] [2021-12-06 18:37:45,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:37:45,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:37:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:37:45,905 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:37:45,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-06 18:37:46,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 18:37:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:37:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 220 conjunts are in the unsatisfiable core [2021-12-06 18:37:46,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:37:47,567 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 14 treesize of output 10 [2021-12-06 18:37:47,891 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 18:37:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:37:47,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:37:48,097 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 13 [2021-12-06 18:37:48,098 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 26 treesize of output 22 [2021-12-06 18:37:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:37:48,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294282596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:37:48,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:37:48,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 49] total 81 [2021-12-06 18:37:48,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034034255] [2021-12-06 18:37:48,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:37:48,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:37:48,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:37:48,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:37:48,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=6249, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:37:48,312 INFO L87 Difference]: Start difference. First operand 23111 states and 26911 transitions. Second operand has 81 states, 81 states have (on average 3.5925925925925926) internal successors, (291), 81 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:37:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:37:53,622 INFO L93 Difference]: Finished difference Result 27990 states and 32302 transitions. [2021-12-06 18:37:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 18:37:53,623 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.5925925925925926) internal successors, (291), 81 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-12-06 18:37:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:37:53,643 INFO L225 Difference]: With dead ends: 27990 [2021-12-06 18:37:53,644 INFO L226 Difference]: Without dead ends: 25877 [2021-12-06 18:37:53,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 351 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=908, Invalid=15348, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 18:37:53,645 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 1505 mSDsluCounter, 16554 mSDsCounter, 0 mSdLazyCounter, 13039 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 16899 SdHoareTripleChecker+Invalid, 13664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 13039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:37:53,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 16899 Invalid, 13664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 13039 Invalid, 0 Unknown, 442 Unchecked, 3.4s Time] [2021-12-06 18:37:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25877 states. [2021-12-06 18:37:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25877 to 24851. [2021-12-06 18:37:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24851 states, 24849 states have (on average 1.1651977946798664) internal successors, (28954), 24850 states have internal predecessors, (28954), 0 states have call successors, (0), 0 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 18:37:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24851 states to 24851 states and 28954 transitions. [2021-12-06 18:37:53,864 INFO L78 Accepts]: Start accepts. Automaton has 24851 states and 28954 transitions. Word has length 192 [2021-12-06 18:37:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:37:53,864 INFO L470 AbstractCegarLoop]: Abstraction has 24851 states and 28954 transitions. [2021-12-06 18:37:53,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.5925925925925926) internal successors, (291), 81 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:37:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24851 states and 28954 transitions. [2021-12-06 18:37:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-06 18:37:53,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:37:53,875 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:37:53,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-12-06 18:37:54,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:37:54,076 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:37:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:37:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1744725974, now seen corresponding path program 28 times [2021-12-06 18:37:54,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:37:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833611106] [2021-12-06 18:37:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:37:54,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:37:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:37:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 30 proven. 1218 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:37:55,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:37:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833611106] [2021-12-06 18:37:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833611106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:37:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126131221] [2021-12-06 18:37:55,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:37:55,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:37:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:37:55,003 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:37:55,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-06 18:37:55,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:37:55,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:37:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 193 conjunts are in the unsatisfiable core [2021-12-06 18:37:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:37:55,232 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:37:55,233 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:37:57,145 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 18:37:57,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:37:57,236 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 18:38:02,365 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:38:02,365 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 19 [2021-12-06 18:38:02,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:38:02,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:38:02,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:38:02,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 17 [2021-12-06 18:38:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 681 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:03,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:09,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:09,909 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 38 [2021-12-06 18:38:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:38:09,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:09,920 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 75 [2021-12-06 18:38:09,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:38:09,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:09,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 80 [2021-12-06 18:38:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 762 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:16,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126131221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:16,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:16,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 51, 52] total 144 [2021-12-06 18:38:16,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613345259] [2021-12-06 18:38:16,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:16,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-06 18:38:16,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-06 18:38:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=19454, Unknown=4, NotChecked=0, Total=20592 [2021-12-06 18:38:16,129 INFO L87 Difference]: Start difference. First operand 24851 states and 28954 transitions. Second operand has 144 states, 144 states have (on average 3.9166666666666665) internal successors, (564), 144 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 18:38:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:46,722 INFO L93 Difference]: Finished difference Result 30616 states and 35364 transitions. [2021-12-06 18:38:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2021-12-06 18:38:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.9166666666666665) internal successors, (564), 144 states have internal predecessors, (564), 0 states have call successors, (0), 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 193 [2021-12-06 18:38:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:46,750 INFO L225 Difference]: With dead ends: 30616 [2021-12-06 18:38:46,750 INFO L226 Difference]: Without dead ends: 30493 [2021-12-06 18:38:46,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 378 SyntacticMatches, 12 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28380 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=6022, Invalid=107202, Unknown=8, NotChecked=0, Total=113232 [2021-12-06 18:38:46,755 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1568 mSDsluCounter, 4346 mSDsCounter, 0 mSdLazyCounter, 6536 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 7380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 6536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:46,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 4412 Invalid, 7380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 6536 Invalid, 0 Unknown, 662 Unchecked, 2.3s Time] [2021-12-06 18:38:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30493 states. [2021-12-06 18:38:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30493 to 25402. [2021-12-06 18:38:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25402 states, 25400 states have (on average 1.1643700787401574) internal successors, (29575), 25401 states have internal predecessors, (29575), 0 states have call successors, (0), 0 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 18:38:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25402 states to 25402 states and 29575 transitions. [2021-12-06 18:38:46,993 INFO L78 Accepts]: Start accepts. Automaton has 25402 states and 29575 transitions. Word has length 193 [2021-12-06 18:38:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:46,993 INFO L470 AbstractCegarLoop]: Abstraction has 25402 states and 29575 transitions. [2021-12-06 18:38:46,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.9166666666666665) internal successors, (564), 144 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 18:38:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 25402 states and 29575 transitions. [2021-12-06 18:38:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-06 18:38:47,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:47,002 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:47,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-12-06 18:38:47,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-12-06 18:38:47,204 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:47,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2088606951, now seen corresponding path program 13 times [2021-12-06 18:38:47,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:47,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155106421] [2021-12-06 18:38:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:47,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 28 proven. 1118 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 18:38:48,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:48,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155106421] [2021-12-06 18:38:48,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155106421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:48,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296714350] [2021-12-06 18:38:48,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:38:48,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:48,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:48,096 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:48,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-06 18:38:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 173 conjunts are in the unsatisfiable core [2021-12-06 18:38:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:48,338 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:38:48,338 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:38:49,467 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 14 treesize of output 10 [2021-12-06 18:38:49,472 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:38:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-06 18:38:49,551 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 17 treesize of output 19 [2021-12-06 18:38:51,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:38:51,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:51,447 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 18 treesize of output 10 [2021-12-06 18:38:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 28 proven. 1133 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:38:51,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:52,616 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5343 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5343) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) 0)) is different from false [2021-12-06 18:38:52,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:52,622 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 23 treesize of output 24 [2021-12-06 18:38:52,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:52,627 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 37 treesize of output 37 [2021-12-06 18:38:52,630 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 11 treesize of output 7 [2021-12-06 18:38:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 28 proven. 1133 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:38:55,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296714350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:55,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:55,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 123 [2021-12-06 18:38:55,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107652523] [2021-12-06 18:38:55,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:55,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-12-06 18:38:55,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:55,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-12-06 18:38:55,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=14406, Unknown=1, NotChecked=240, Total=15006 [2021-12-06 18:38:55,759 INFO L87 Difference]: Start difference. First operand 25402 states and 29575 transitions. Second operand has 123 states, 123 states have (on average 4.430894308943089) internal successors, (545), 123 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:03,203 INFO L93 Difference]: Finished difference Result 42556 states and 49420 transitions. [2021-12-06 18:39:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 18:39:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 4.430894308943089) internal successors, (545), 123 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-12-06 18:39:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:03,224 INFO L225 Difference]: With dead ends: 42556 [2021-12-06 18:39:03,224 INFO L226 Difference]: Without dead ends: 27545 [2021-12-06 18:39:03,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5404 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=979, Invalid=36079, Unknown=2, NotChecked=382, Total=37442 [2021-12-06 18:39:03,225 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 455 mSDsluCounter, 13945 mSDsCounter, 0 mSdLazyCounter, 7743 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 14112 SdHoareTripleChecker+Invalid, 12568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 7743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4807 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:03,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 14112 Invalid, 12568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 7743 Invalid, 0 Unknown, 4807 Unchecked, 2.2s Time] [2021-12-06 18:39:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27545 states. [2021-12-06 18:39:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27545 to 24561. [2021-12-06 18:39:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24561 states, 24559 states have (on average 1.1639317561789975) internal successors, (28585), 24560 states have internal predecessors, (28585), 0 states have call successors, (0), 0 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 18:39:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24561 states to 24561 states and 28585 transitions. [2021-12-06 18:39:03,446 INFO L78 Accepts]: Start accepts. Automaton has 24561 states and 28585 transitions. Word has length 194 [2021-12-06 18:39:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:03,447 INFO L470 AbstractCegarLoop]: Abstraction has 24561 states and 28585 transitions. [2021-12-06 18:39:03,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 4.430894308943089) internal successors, (545), 123 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 24561 states and 28585 transitions. [2021-12-06 18:39:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-06 18:39:03,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:03,455 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:03,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-12-06 18:39:03,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:03,656 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1949425035, now seen corresponding path program 12 times [2021-12-06 18:39:03,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:03,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844476064] [2021-12-06 18:39:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:03,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 59 proven. 1561 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:39:04,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:04,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844476064] [2021-12-06 18:39:04,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844476064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:04,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917118312] [2021-12-06 18:39:04,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:39:04,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:04,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:04,392 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:04,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-06 18:39:05,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-12-06 18:39:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 210 conjunts are in the unsatisfiable core [2021-12-06 18:39:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:39:06,623 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 18:39:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 59 proven. 1561 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:39:06,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:06,885 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 13 [2021-12-06 18:39:06,886 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 26 treesize of output 22 [2021-12-06 18:39:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 59 proven. 1561 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:39:07,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917118312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:07,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:07,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47, 47] total 78 [2021-12-06 18:39:07,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333245771] [2021-12-06 18:39:07,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:07,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 18:39:07,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 18:39:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=5783, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:39:07,110 INFO L87 Difference]: Start difference. First operand 24561 states and 28585 transitions. Second operand has 78 states, 78 states have (on average 3.8974358974358974) internal successors, (304), 78 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:12,199 INFO L93 Difference]: Finished difference Result 26023 states and 29950 transitions. [2021-12-06 18:39:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 18:39:12,199 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.8974358974358974) internal successors, (304), 78 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-12-06 18:39:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:12,213 INFO L225 Difference]: With dead ends: 26023 [2021-12-06 18:39:12,214 INFO L226 Difference]: Without dead ends: 22795 [2021-12-06 18:39:12,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 358 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=873, Invalid=14133, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 18:39:12,214 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 1301 mSDsluCounter, 14905 mSDsCounter, 0 mSdLazyCounter, 11904 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 15232 SdHoareTripleChecker+Invalid, 12250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 11904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:12,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 15232 Invalid, 12250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 11904 Invalid, 0 Unknown, 209 Unchecked, 3.2s Time] [2021-12-06 18:39:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22795 states. [2021-12-06 18:39:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22795 to 22012. [2021-12-06 18:39:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22012 states, 22010 states have (on average 1.1594729668332575) internal successors, (25520), 22011 states have internal predecessors, (25520), 0 states have call successors, (0), 0 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 18:39:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22012 states to 22012 states and 25520 transitions. [2021-12-06 18:39:12,399 INFO L78 Accepts]: Start accepts. Automaton has 22012 states and 25520 transitions. Word has length 195 [2021-12-06 18:39:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:12,400 INFO L470 AbstractCegarLoop]: Abstraction has 22012 states and 25520 transitions. [2021-12-06 18:39:12,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.8974358974358974) internal successors, (304), 78 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22012 states and 25520 transitions. [2021-12-06 18:39:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-06 18:39:12,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:12,406 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:12,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-12-06 18:39:12,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:12,607 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2138267302, now seen corresponding path program 37 times [2021-12-06 18:39:12,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:12,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218985990] [2021-12-06 18:39:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:12,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 630 proven. 1140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:13,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218985990] [2021-12-06 18:39:13,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218985990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339557208] [2021-12-06 18:39:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:39:13,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:13,409 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:13,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-06 18:39:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 198 conjunts are in the unsatisfiable core [2021-12-06 18:39:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 703 proven. 1067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:14,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:15,500 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 18:39:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 703 proven. 1067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:15,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339557208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:15,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:15,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 98 [2021-12-06 18:39:15,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127651411] [2021-12-06 18:39:15,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:15,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 18:39:15,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 18:39:15,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=8645, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 18:39:15,604 INFO L87 Difference]: Start difference. First operand 22012 states and 25520 transitions. Second operand has 99 states, 98 states have (on average 4.030612244897959) internal successors, (395), 99 states have internal predecessors, (395), 0 states have call successors, (0), 0 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 18:39:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:20,603 INFO L93 Difference]: Finished difference Result 23914 states and 27431 transitions. [2021-12-06 18:39:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 18:39:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 4.030612244897959) internal successors, (395), 99 states have internal predecessors, (395), 0 states have call successors, (0), 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 196 [2021-12-06 18:39:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:20,619 INFO L225 Difference]: With dead ends: 23914 [2021-12-06 18:39:20,619 INFO L226 Difference]: Without dead ends: 23914 [2021-12-06 18:39:20,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5550 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5007, Invalid=21399, Unknown=0, NotChecked=0, Total=26406 [2021-12-06 18:39:20,620 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 1956 mSDsluCounter, 5617 mSDsCounter, 0 mSdLazyCounter, 7812 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1956 SdHoareTripleChecker+Valid, 5780 SdHoareTripleChecker+Invalid, 7965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 7812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:20,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1956 Valid, 5780 Invalid, 7965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 7812 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 18:39:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23914 states. [2021-12-06 18:39:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23914 to 22157. [2021-12-06 18:39:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22157 states, 22155 states have (on average 1.1596930715414129) internal successors, (25693), 22156 states have internal predecessors, (25693), 0 states have call successors, (0), 0 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 18:39:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22157 states to 22157 states and 25693 transitions. [2021-12-06 18:39:20,823 INFO L78 Accepts]: Start accepts. Automaton has 22157 states and 25693 transitions. Word has length 196 [2021-12-06 18:39:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:20,824 INFO L470 AbstractCegarLoop]: Abstraction has 22157 states and 25693 transitions. [2021-12-06 18:39:20,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 4.030612244897959) internal successors, (395), 99 states have internal predecessors, (395), 0 states have call successors, (0), 0 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 18:39:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 22157 states and 25693 transitions. [2021-12-06 18:39:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-06 18:39:20,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:20,830 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:20,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-12-06 18:39:21,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:21,031 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1249748903, now seen corresponding path program 29 times [2021-12-06 18:39:21,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:21,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465980968] [2021-12-06 18:39:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:21,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 325 proven. 980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:39:21,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:21,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465980968] [2021-12-06 18:39:21,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465980968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:21,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944321401] [2021-12-06 18:39:21,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:39:21,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:21,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:21,546 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:21,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-12-06 18:39:21,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 18:39:21,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 158 conjunts are in the unsatisfiable core [2021-12-06 18:39:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 378 proven. 927 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:39:22,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:23,515 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 21 treesize of output 17 [2021-12-06 18:39:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 378 proven. 927 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:39:24,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944321401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:24,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:24,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 88 [2021-12-06 18:39:24,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388986597] [2021-12-06 18:39:24,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:24,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 18:39:24,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:24,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 18:39:24,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 18:39:24,155 INFO L87 Difference]: Start difference. First operand 22157 states and 25693 transitions. Second operand has 89 states, 88 states have (on average 5.261363636363637) internal successors, (463), 89 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 18:39:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:26,949 INFO L93 Difference]: Finished difference Result 49856 states and 58178 transitions. [2021-12-06 18:39:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 18:39:26,950 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 5.261363636363637) internal successors, (463), 89 states have internal predecessors, (463), 0 states have call successors, (0), 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 197 [2021-12-06 18:39:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:26,988 INFO L225 Difference]: With dead ends: 49856 [2021-12-06 18:39:26,988 INFO L226 Difference]: Without dead ends: 49856 [2021-12-06 18:39:26,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4246 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3955, Invalid=15227, Unknown=0, NotChecked=0, Total=19182 [2021-12-06 18:39:26,990 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 1404 mSDsluCounter, 5729 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 5959 SdHoareTripleChecker+Invalid, 4406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:26,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1404 Valid, 5959 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:39:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2021-12-06 18:39:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 23274. [2021-12-06 18:39:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23274 states, 23272 states have (on average 1.1603214162942592) internal successors, (27003), 23273 states have internal predecessors, (27003), 0 states have call successors, (0), 0 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 18:39:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23274 states to 23274 states and 27003 transitions. [2021-12-06 18:39:27,305 INFO L78 Accepts]: Start accepts. Automaton has 23274 states and 27003 transitions. Word has length 197 [2021-12-06 18:39:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:27,305 INFO L470 AbstractCegarLoop]: Abstraction has 23274 states and 27003 transitions. [2021-12-06 18:39:27,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 5.261363636363637) internal successors, (463), 89 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 18:39:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 23274 states and 27003 transitions. [2021-12-06 18:39:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 18:39:27,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:27,314 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:27,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-12-06 18:39:27,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:27,515 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1277267637, now seen corresponding path program 38 times [2021-12-06 18:39:27,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:27,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368765868] [2021-12-06 18:39:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:27,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 62 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:28,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368765868] [2021-12-06 18:39:28,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368765868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828276537] [2021-12-06 18:39:28,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:39:28,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:28,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:28,361 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:28,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-12-06 18:39:28,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:39:28,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 230 conjunts are in the unsatisfiable core [2021-12-06 18:39:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:29,223 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 14 treesize of output 10 [2021-12-06 18:39:29,566 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 18:39:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 62 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:29,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:29,778 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 13 [2021-12-06 18:39:29,779 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 26 treesize of output 22 [2021-12-06 18:39:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 62 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:29,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828276537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:29,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:29,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 84 [2021-12-06 18:39:29,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020961813] [2021-12-06 18:39:29,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:29,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 18:39:29,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 18:39:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6733, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 18:39:29,997 INFO L87 Difference]: Start difference. First operand 23274 states and 27003 transitions. Second operand has 84 states, 84 states have (on average 3.619047619047619) internal successors, (304), 84 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:35,980 INFO L93 Difference]: Finished difference Result 28478 states and 32768 transitions. [2021-12-06 18:39:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 18:39:35,981 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.619047619047619) internal successors, (304), 84 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-12-06 18:39:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:35,999 INFO L225 Difference]: With dead ends: 28478 [2021-12-06 18:39:35,999 INFO L226 Difference]: Without dead ends: 26094 [2021-12-06 18:39:36,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 368 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=943, Invalid=16613, Unknown=0, NotChecked=0, Total=17556 [2021-12-06 18:39:36,000 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 1550 mSDsluCounter, 18145 mSDsCounter, 0 mSdLazyCounter, 14646 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 18508 SdHoareTripleChecker+Invalid, 14839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 14646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:36,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 18508 Invalid, 14839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 14646 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-06 18:39:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2021-12-06 18:39:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 25114. [2021-12-06 18:39:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25114 states, 25112 states have (on average 1.1613571201019433) internal successors, (29164), 25113 states have internal predecessors, (29164), 0 states have call successors, (0), 0 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 18:39:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25114 states to 25114 states and 29164 transitions. [2021-12-06 18:39:36,227 INFO L78 Accepts]: Start accepts. Automaton has 25114 states and 29164 transitions. Word has length 201 [2021-12-06 18:39:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:36,228 INFO L470 AbstractCegarLoop]: Abstraction has 25114 states and 29164 transitions. [2021-12-06 18:39:36,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.619047619047619) internal successors, (304), 84 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 25114 states and 29164 transitions. [2021-12-06 18:39:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-06 18:39:36,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:36,236 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:36,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-12-06 18:39:36,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:36,437 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1187674776, now seen corresponding path program 14 times [2021-12-06 18:39:36,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:36,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169918871] [2021-12-06 18:39:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:36,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 30 proven. 1288 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:39:37,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169918871] [2021-12-06 18:39:37,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169918871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524850060] [2021-12-06 18:39:37,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:39:37,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:37,387 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:37,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-12-06 18:39:37,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:39:37,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:37,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 181 conjunts are in the unsatisfiable core [2021-12-06 18:39:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:37,672 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 18:39:38,328 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 14 treesize of output 10 [2021-12-06 18:39:38,390 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 17 treesize of output 19 [2021-12-06 18:39:39,155 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 18:39:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 30 proven. 1288 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:39:39,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:39,507 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5806 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5806) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 14)) 0)) is different from false [2021-12-06 18:39:39,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:39:39,511 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 23 treesize of output 24 [2021-12-06 18:39:39,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:39:39,515 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 37 treesize of output 37 [2021-12-06 18:39:39,517 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 11 treesize of output 7 [2021-12-06 18:39:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 30 proven. 1288 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:39:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524850060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:39,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:39,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 40, 40] total 88 [2021-12-06 18:39:39,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801142788] [2021-12-06 18:39:39,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:39,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 18:39:39,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 18:39:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=7263, Unknown=1, NotChecked=170, Total=7656 [2021-12-06 18:39:39,877 INFO L87 Difference]: Start difference. First operand 25114 states and 29164 transitions. Second operand has 88 states, 88 states have (on average 4.3522727272727275) internal successors, (383), 88 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 18:39:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:44,899 INFO L93 Difference]: Finished difference Result 43172 states and 50137 transitions. [2021-12-06 18:39:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 18:39:44,900 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 4.3522727272727275) internal successors, (383), 88 states have internal predecessors, (383), 0 states have call successors, (0), 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 202 [2021-12-06 18:39:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:44,918 INFO L225 Difference]: With dead ends: 43172 [2021-12-06 18:39:44,918 INFO L226 Difference]: Without dead ends: 24438 [2021-12-06 18:39:44,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 361 SyntacticMatches, 3 SemanticMatches, 140 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=522, Invalid=19221, Unknown=1, NotChecked=278, Total=20022 [2021-12-06 18:39:44,919 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 328 mSDsluCounter, 12375 mSDsCounter, 0 mSdLazyCounter, 10874 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 12586 SdHoareTripleChecker+Invalid, 11578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 10874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:44,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 12586 Invalid, 11578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 10874 Invalid, 0 Unknown, 683 Unchecked, 3.0s Time] [2021-12-06 18:39:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24438 states. [2021-12-06 18:39:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24438 to 22767. [2021-12-06 18:39:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22767 states, 22765 states have (on average 1.1658247309466285) internal successors, (26540), 22766 states have internal predecessors, (26540), 0 states have call successors, (0), 0 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 18:39:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22767 states to 22767 states and 26540 transitions. [2021-12-06 18:39:45,105 INFO L78 Accepts]: Start accepts. Automaton has 22767 states and 26540 transitions. Word has length 202 [2021-12-06 18:39:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:45,105 INFO L470 AbstractCegarLoop]: Abstraction has 22767 states and 26540 transitions. [2021-12-06 18:39:45,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 4.3522727272727275) internal successors, (383), 88 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 18:39:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22767 states and 26540 transitions. [2021-12-06 18:39:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-06 18:39:45,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:45,111 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:45,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-12-06 18:39:45,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:45,312 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1697653518, now seen corresponding path program 39 times [2021-12-06 18:39:45,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:45,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137729212] [2021-12-06 18:39:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:45,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 703 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:46,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:46,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137729212] [2021-12-06 18:39:46,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137729212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:46,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856444008] [2021-12-06 18:39:46,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:39:46,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:46,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:46,174 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:46,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-12-06 18:39:47,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 18:39:47,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 18:39:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:47,512 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:39:47,512 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:39:47,774 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 14 treesize of output 10 [2021-12-06 18:39:49,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:39:49,968 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 20 treesize of output 20 [2021-12-06 18:39:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 20 proven. 102 refuted. 0 times theorem prover too weak. 1831 trivial. 0 not checked. [2021-12-06 18:39:50,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:51,240 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 13 treesize of output 11 [2021-12-06 18:39:51,243 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 18:39:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 1831 trivial. 0 not checked. [2021-12-06 18:39:51,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856444008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:51,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:51,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 10, 10] total 67 [2021-12-06 18:39:51,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854930277] [2021-12-06 18:39:51,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:51,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 18:39:51,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 18:39:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=4052, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:39:51,501 INFO L87 Difference]: Start difference. First operand 22767 states and 26540 transitions. Second operand has 68 states, 67 states have (on average 3.8358208955223883) internal successors, (257), 68 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 18:39:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:56,146 INFO L93 Difference]: Finished difference Result 25043 states and 29102 transitions. [2021-12-06 18:39:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-06 18:39:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.8358208955223883) internal successors, (257), 68 states have internal predecessors, (257), 0 states have call successors, (0), 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 205 [2021-12-06 18:39:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:56,164 INFO L225 Difference]: With dead ends: 25043 [2021-12-06 18:39:56,164 INFO L226 Difference]: Without dead ends: 24836 [2021-12-06 18:39:56,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2714, Invalid=23046, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 18:39:56,166 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 143 mSDsluCounter, 3337 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:56,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 3439 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2031 Invalid, 0 Unknown, 497 Unchecked, 0.7s Time] [2021-12-06 18:39:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24836 states. [2021-12-06 18:39:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24836 to 22575. [2021-12-06 18:39:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22575 states, 22573 states have (on average 1.1658175696628716) internal successors, (26316), 22574 states have internal predecessors, (26316), 0 states have call successors, (0), 0 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 18:39:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22575 states to 22575 states and 26316 transitions. [2021-12-06 18:39:56,366 INFO L78 Accepts]: Start accepts. Automaton has 22575 states and 26316 transitions. Word has length 205 [2021-12-06 18:39:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:56,366 INFO L470 AbstractCegarLoop]: Abstraction has 22575 states and 26316 transitions. [2021-12-06 18:39:56,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.8358208955223883) internal successors, (257), 68 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 18:39:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 22575 states and 26316 transitions. [2021-12-06 18:39:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-06 18:39:56,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:56,372 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:56,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-12-06 18:39:56,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-12-06 18:39:56,573 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash -575837852, now seen corresponding path program 30 times [2021-12-06 18:39:56,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:56,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337721709] [2021-12-06 18:39:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:56,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 32 proven. 1395 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:39:57,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337721709] [2021-12-06 18:39:57,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337721709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124102683] [2021-12-06 18:39:57,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:39:57,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:57,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:57,551 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:57,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-12-06 18:39:58,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-06 18:39:58,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:58,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 238 conjunts are in the unsatisfiable core [2021-12-06 18:39:58,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:58,663 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:39:58,663 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:39:59,610 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 14 treesize of output 10 [2021-12-06 18:39:59,700 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-12-06 18:39:59,701 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 25 treesize of output 24 [2021-12-06 18:40:04,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:40:04,616 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-12-06 18:40:04,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 34 [2021-12-06 18:40:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 32 proven. 1395 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:40:05,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:08,753 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-12-06 18:40:08,753 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-12-06 18:40:08,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:40:08,761 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 163 treesize of output 157 [2021-12-06 18:40:08,789 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-12-06 18:40:08,789 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 138 treesize of output 129 [2021-12-06 18:40:08,828 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-12-06 18:40:08,829 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 85 treesize of output 93 [2021-12-06 18:40:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1427 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:40:18,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124102683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:18,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:18,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 146 [2021-12-06 18:40:18,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719567072] [2021-12-06 18:40:18,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:18,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-12-06 18:40:18,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:18,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-12-06 18:40:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=20704, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 18:40:18,674 INFO L87 Difference]: Start difference. First operand 22575 states and 26316 transitions. Second operand has 146 states, 146 states have (on average 4.1438356164383565) internal successors, (605), 146 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 18:40:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:24,344 INFO L93 Difference]: Finished difference Result 40186 states and 46914 transitions. [2021-12-06 18:40:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 18:40:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 4.1438356164383565) internal successors, (605), 146 states have internal predecessors, (605), 0 states have call successors, (0), 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 205 [2021-12-06 18:40:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:24,377 INFO L225 Difference]: With dead ends: 40186 [2021-12-06 18:40:24,378 INFO L226 Difference]: Without dead ends: 40055 [2021-12-06 18:40:24,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5092 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=672, Invalid=30128, Unknown=0, NotChecked=0, Total=30800 [2021-12-06 18:40:24,379 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 364 mSDsluCounter, 10697 mSDsCounter, 0 mSdLazyCounter, 8341 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 10832 SdHoareTripleChecker+Invalid, 12542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4194 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:24,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 10832 Invalid, 12542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8341 Invalid, 0 Unknown, 4194 Unchecked, 2.8s Time] [2021-12-06 18:40:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40055 states. [2021-12-06 18:40:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40055 to 39911. [2021-12-06 18:40:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39911 states, 39909 states have (on average 1.1686586985391767) internal successors, (46640), 39910 states have internal predecessors, (46640), 0 states have call successors, (0), 0 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 18:40:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39911 states to 39911 states and 46640 transitions. [2021-12-06 18:40:24,706 INFO L78 Accepts]: Start accepts. Automaton has 39911 states and 46640 transitions. Word has length 205 [2021-12-06 18:40:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:24,707 INFO L470 AbstractCegarLoop]: Abstraction has 39911 states and 46640 transitions. [2021-12-06 18:40:24,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 4.1438356164383565) internal successors, (605), 146 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 18:40:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39911 states and 46640 transitions. [2021-12-06 18:40:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-06 18:40:24,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:24,719 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:24,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-12-06 18:40:24,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-12-06 18:40:24,920 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:40:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash -506090137, now seen corresponding path program 31 times [2021-12-06 18:40:24,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:24,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129918885] [2021-12-06 18:40:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:24,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 378 proven. 1110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:40:25,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:25,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129918885] [2021-12-06 18:40:25,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129918885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:25,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294665434] [2021-12-06 18:40:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:40:25,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:25,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:25,494 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:25,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-12-06 18:40:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-06 18:40:25,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 435 proven. 1053 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:40:26,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:27,432 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 18:40:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 435 proven. 1053 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:40:27,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294665434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:27,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:27,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 78 [2021-12-06 18:40:27,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669963853] [2021-12-06 18:40:27,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:27,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 18:40:27,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 18:40:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=5463, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 18:40:27,521 INFO L87 Difference]: Start difference. First operand 39911 states and 46640 transitions. Second operand has 79 states, 78 states have (on average 5.371794871794871) internal successors, (419), 79 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 18:40:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:30,624 INFO L93 Difference]: Finished difference Result 68041 states and 79648 transitions. [2021-12-06 18:40:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 18:40:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 5.371794871794871) internal successors, (419), 79 states have internal predecessors, (419), 0 states have call successors, (0), 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 209 [2021-12-06 18:40:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:30,679 INFO L225 Difference]: With dead ends: 68041 [2021-12-06 18:40:30,680 INFO L226 Difference]: Without dead ends: 68041 [2021-12-06 18:40:30,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 375 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3228, Invalid=13802, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 18:40:30,681 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 1106 mSDsluCounter, 5968 mSDsCounter, 0 mSdLazyCounter, 4968 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 6194 SdHoareTripleChecker+Invalid, 5042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 4968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:30,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 6194 Invalid, 5042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 4968 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:40:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68041 states. [2021-12-06 18:40:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68041 to 41131. [2021-12-06 18:40:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41131 states, 41129 states have (on average 1.168810328478689) internal successors, (48072), 41130 states have internal predecessors, (48072), 0 states have call successors, (0), 0 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 18:40:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41131 states to 41131 states and 48072 transitions. [2021-12-06 18:40:31,139 INFO L78 Accepts]: Start accepts. Automaton has 41131 states and 48072 transitions. Word has length 209 [2021-12-06 18:40:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:31,139 INFO L470 AbstractCegarLoop]: Abstraction has 41131 states and 48072 transitions. [2021-12-06 18:40:31,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 5.371794871794871) internal successors, (419), 79 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 18:40:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 41131 states and 48072 transitions. [2021-12-06 18:40:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-06 18:40:31,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:31,150 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:31,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-12-06 18:40:31,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-12-06 18:40:31,352 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:40:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2124194076, now seen corresponding path program 15 times [2021-12-06 18:40:31,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:31,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490231531] [2021-12-06 18:40:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:31,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 32 proven. 1470 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:40:32,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490231531] [2021-12-06 18:40:32,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490231531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075618076] [2021-12-06 18:40:32,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:40:32,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:32,393 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:32,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-12-06 18:40:33,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 18:40:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:40:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 195 conjunts are in the unsatisfiable core [2021-12-06 18:40:33,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:33,292 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 18:40:33,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:40:33,703 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 18:40:34,581 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 18:40:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 32 proven. 1470 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:40:34,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:35,492 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6177 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_6177) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 15)) 0)) is different from false [2021-12-06 18:40:35,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:40:35,496 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 23 treesize of output 24 [2021-12-06 18:40:35,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:40:35,500 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 37 treesize of output 37 [2021-12-06 18:40:35,503 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 11 treesize of output 7 [2021-12-06 18:40:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 32 proven. 1470 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:40:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075618076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:36,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:36,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 42, 42] total 105 [2021-12-06 18:40:36,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811213279] [2021-12-06 18:40:36,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:36,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-06 18:40:36,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-06 18:40:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=10450, Unknown=1, NotChecked=204, Total=10920 [2021-12-06 18:40:36,660 INFO L87 Difference]: Start difference. First operand 41131 states and 48072 transitions. Second operand has 105 states, 105 states have (on average 5.0285714285714285) internal successors, (528), 105 states have internal predecessors, (528), 0 states have call successors, (0), 0 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 18:40:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:46,141 INFO L93 Difference]: Finished difference Result 68049 states and 79408 transitions. [2021-12-06 18:40:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-06 18:40:46,141 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 5.0285714285714285) internal successors, (528), 105 states have internal predecessors, (528), 0 states have call successors, (0), 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 214 [2021-12-06 18:40:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:46,167 INFO L225 Difference]: With dead ends: 68049 [2021-12-06 18:40:46,167 INFO L226 Difference]: Without dead ends: 36965 [2021-12-06 18:40:46,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 371 SyntacticMatches, 3 SemanticMatches, 180 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1186, Invalid=31397, Unknown=1, NotChecked=358, Total=32942 [2021-12-06 18:40:46,169 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 1375 mSDsluCounter, 23912 mSDsCounter, 0 mSdLazyCounter, 18395 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 24310 SdHoareTripleChecker+Invalid, 19022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 18395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:46,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 24310 Invalid, 19022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 18395 Invalid, 0 Unknown, 489 Unchecked, 5.2s Time] [2021-12-06 18:40:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36965 states. [2021-12-06 18:40:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36965 to 24006. [2021-12-06 18:40:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24006 states, 24004 states have (on average 1.1658056990501584) internal successors, (27984), 24005 states have internal predecessors, (27984), 0 states have call successors, (0), 0 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 18:40:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24006 states to 24006 states and 27984 transitions. [2021-12-06 18:40:46,477 INFO L78 Accepts]: Start accepts. Automaton has 24006 states and 27984 transitions. Word has length 214 [2021-12-06 18:40:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:46,477 INFO L470 AbstractCegarLoop]: Abstraction has 24006 states and 27984 transitions. [2021-12-06 18:40:46,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 5.0285714285714285) internal successors, (528), 105 states have internal predecessors, (528), 0 states have call successors, (0), 0 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 18:40:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24006 states and 27984 transitions. [2021-12-06 18:40:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-06 18:40:46,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:46,483 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:46,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-12-06 18:40:46,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:46,684 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:40:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 537326622, now seen corresponding path program 13 times [2021-12-06 18:40:46,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:46,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940377249] [2021-12-06 18:40:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:46,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 703 proven. 1357 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:40:47,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:47,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940377249] [2021-12-06 18:40:47,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940377249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:47,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701759972] [2021-12-06 18:40:47,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:40:47,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:47,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:47,532 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:47,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a820c62e-2b17-46e4-877e-4dc2663fb9ee/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-12-06 18:40:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 207 conjunts are in the unsatisfiable core [2021-12-06 18:40:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 780 proven. 1280 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:40:48,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:49,794 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 18:40:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 780 proven. 1280 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:40:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701759972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:49,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:49,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 104 [2021-12-06 18:40:49,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192302776] [2021-12-06 18:40:49,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:49,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-06 18:40:49,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-06 18:40:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=9763, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 18:40:49,898 INFO L87 Difference]: Start difference. First operand 24006 states and 27984 transitions. Second operand has 105 states, 104 states have (on average 4.221153846153846) internal successors, (439), 105 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)