./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/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_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/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_00edc235-ae6b-4ad6-b5b0-6b02777d1643/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 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:42:19,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:42:19,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:42:19,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:42:19,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:42:19,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:42:19,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:42:19,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:42:19,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:42:19,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:42:19,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:42:19,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:42:19,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:42:19,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:42:19,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:42:19,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:42:19,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:42:19,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:42:19,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:42:19,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:42:19,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:42:19,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:42:19,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:42:19,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:42:19,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:42:19,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:42:19,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:42:19,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:42:19,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:42:19,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:42:19,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:42:19,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:42:19,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:42:19,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:42:19,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:42:19,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:42:19,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:42:19,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:42:19,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:42:19,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:42:19,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:42:19,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 18:42:19,819 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:42:19,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:42:19,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:42:19,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:42:19,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:42:19,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:42:19,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:42:19,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:42:19,822 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:42:19,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:42:19,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:42:19,822 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:42:19,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:42:19,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:42:19,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:42:19,823 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:42:19,823 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:42:19,823 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:42:19,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:42:19,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:42:19,824 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:42:19,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:42:19,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:42:19,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:42:19,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:42:19,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:42:19,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:42:19,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:42:19,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:42:19,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:42:19,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:42:19,826 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_00edc235-ae6b-4ad6-b5b0-6b02777d1643/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2021-12-06 18:42:19,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:42:20,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:42:20,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:42:20,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:42:20,011 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:42:20,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-12-06 18:42:20,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/data/5deded26c/c2cdaab17d8c4f4aa15d09cfb96106ef/FLAG8434d11d0 [2021-12-06 18:42:20,494 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:42:20,494 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-12-06 18:42:20,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/data/5deded26c/c2cdaab17d8c4f4aa15d09cfb96106ef/FLAG8434d11d0 [2021-12-06 18:42:20,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/data/5deded26c/c2cdaab17d8c4f4aa15d09cfb96106ef [2021-12-06 18:42:20,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:42:20,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:42:20,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:42:20,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:42:20,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:42:20,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc3e72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20, skipping insertion in model container [2021-12-06 18:42:20,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:42:20,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:42:20,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:42:20,727 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:42:20,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:42:20,789 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:42:20,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20 WrapperNode [2021-12-06 18:42:20,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:42:20,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:42:20,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:42:20,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:42:20,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,828 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-12-06 18:42:20,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:42:20,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:42:20,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:42:20,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:42:20,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:42:20,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:42:20,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:42:20,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:42:20,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (1/1) ... [2021-12-06 18:42:20,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:42:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:20,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:42:20,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:42:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:42:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:42:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:42:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:42:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:42:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:42:20,972 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:42:20,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:42:21,116 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:42:21,121 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:42:21,121 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:42:21,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:42:21 BoogieIcfgContainer [2021-12-06 18:42:21,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:42:21,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:42:21,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:42:21,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:42:21,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:42:20" (1/3) ... [2021-12-06 18:42:21,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6da557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:42:21, skipping insertion in model container [2021-12-06 18:42:21,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:42:20" (2/3) ... [2021-12-06 18:42:21,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6da557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:42:21, skipping insertion in model container [2021-12-06 18:42:21,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:42:21" (3/3) ... [2021-12-06 18:42:21,128 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2021-12-06 18:42:21,132 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:42:21,133 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-06 18:42:21,164 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:42:21,169 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 18:42:21,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-06 18:42:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) 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 18:42:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:42:21,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:21,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 18:42:21,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218495997] [2021-12-06 18:42:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,339 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 18:42:21,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218495997] [2021-12-06 18:42:21,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218495997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:21,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:21,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:42:21,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435383135] [2021-12-06 18:42:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:21,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:42:21,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:21,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:42:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:42:21,367 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) 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) 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 18:42:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:21,407 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-06 18:42:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:42:21,409 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 18:42:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:21,415 INFO L225 Difference]: With dead ends: 100 [2021-12-06 18:42:21,415 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 18:42:21,417 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 18:42:21,419 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 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 18:42:21,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 18:42:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-12-06 18:42:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-06 18:42:21,446 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-12-06 18:42:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:21,446 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-06 18:42:21,446 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 18:42:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-06 18:42:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:42:21,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:21,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:42:21,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-06 18:42:21,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065591863] [2021-12-06 18:42:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,496 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 18:42:21,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065591863] [2021-12-06 18:42:21,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065591863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:21,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:21,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:42:21,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548201768] [2021-12-06 18:42:21,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:21,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:42:21,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:42:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:42:21,499 INFO L87 Difference]: Start difference. First operand 55 states and 63 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 18:42:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:21,531 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-06 18:42:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:42:21,531 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 18:42:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:21,532 INFO L225 Difference]: With dead ends: 53 [2021-12-06 18:42:21,533 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 18:42:21,533 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 18:42:21,534 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:21,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 18:42:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 18:42:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 18:42:21,542 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-12-06 18:42:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:21,542 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 18:42:21,542 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 18:42:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 18:42:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:42:21,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:21,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:42:21,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-06 18:42:21,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413188063] [2021-12-06 18:42:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,615 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 18:42:21,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413188063] [2021-12-06 18:42:21,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413188063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:21,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:21,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:42:21,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425010813] [2021-12-06 18:42:21,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:21,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:42:21,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:21,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:42:21,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:42:21,617 INFO L87 Difference]: Start difference. First operand 53 states and 61 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 18:42:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:21,679 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-06 18:42:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:42:21,679 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 18:42:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:21,680 INFO L225 Difference]: With dead ends: 97 [2021-12-06 18:42:21,680 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 18:42:21,681 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 18:42:21,682 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:21,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 18:42:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-12-06 18:42:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 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 18:42:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-06 18:42:21,690 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-12-06 18:42:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:21,690 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-06 18:42:21,690 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 18:42:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-06 18:42:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:42:21,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:21,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:42:21,692 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-06 18:42:21,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106408885] [2021-12-06 18:42:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,747 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 18:42:21,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106408885] [2021-12-06 18:42:21,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106408885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:21,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:21,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:42:21,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333486685] [2021-12-06 18:42:21,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:21,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:42:21,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:42:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:42:21,749 INFO L87 Difference]: Start difference. First operand 55 states and 64 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 18:42:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:21,776 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-06 18:42:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:42:21,776 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 18:42:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:21,777 INFO L225 Difference]: With dead ends: 54 [2021-12-06 18:42:21,777 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 18:42:21,777 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 18:42:21,779 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:21,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 18:42:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 18:42:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-06 18:42:21,785 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2021-12-06 18:42:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:21,785 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-06 18:42:21,785 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 18:42:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-06 18:42:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:42:21,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:21,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:42:21,786 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-06 18:42:21,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798590442] [2021-12-06 18:42:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,822 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 18:42:21,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798590442] [2021-12-06 18:42:21,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798590442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:21,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:21,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:42:21,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72870199] [2021-12-06 18:42:21,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:21,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:42:21,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:42:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:42:21,824 INFO L87 Difference]: Start difference. First operand 54 states and 63 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 18:42:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:21,841 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-06 18:42:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:42:21,841 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 18:42:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:21,842 INFO L225 Difference]: With dead ends: 98 [2021-12-06 18:42:21,842 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 18:42:21,843 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 18:42:21,844 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 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 18:42:21,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 18:42:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-06 18:42:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-12-06 18:42:21,849 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2021-12-06 18:42:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:21,850 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-12-06 18:42:21,850 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 18:42:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-12-06 18:42:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:42:21,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:21,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:42:21,851 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-06 18:42:21,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50997698] [2021-12-06 18:42:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,874 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 18:42:21,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50997698] [2021-12-06 18:42:21,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50997698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:21,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:21,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:42:21,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041205892] [2021-12-06 18:42:21,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:21,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:42:21,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:21,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:42:21,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:42:21,876 INFO L87 Difference]: Start difference. First operand 65 states and 77 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 18:42:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:21,892 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-12-06 18:42:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:42:21,893 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 18:42:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:21,894 INFO L225 Difference]: With dead ends: 63 [2021-12-06 18:42:21,894 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 18:42:21,894 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 18:42:21,895 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:21,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 18:42:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 18:42:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-06 18:42:21,901 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-12-06 18:42:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:21,902 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-06 18:42:21,902 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 18:42:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-06 18:42:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:42:21,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:21,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:42:21,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-06 18:42:21,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145825013] [2021-12-06 18:42:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,951 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 18:42:21,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145825013] [2021-12-06 18:42:21,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145825013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:21,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:21,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:42:21,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541126752] [2021-12-06 18:42:21,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:21,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:42:21,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:42:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:42:21,953 INFO L87 Difference]: Start difference. First operand 63 states and 75 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 18:42:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:22,004 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-12-06 18:42:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:42:22,004 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 18:42:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:22,005 INFO L225 Difference]: With dead ends: 98 [2021-12-06 18:42:22,005 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 18:42:22,005 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 18:42:22,006 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:22,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 18:42:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-06 18:42:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-12-06 18:42:22,011 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2021-12-06 18:42:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:22,011 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-12-06 18:42:22,011 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 18:42:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-12-06 18:42:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:42:22,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:22,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:22,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:42:22,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-06 18:42:22,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731812321] [2021-12-06 18:42:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:22,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:22,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:22,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731812321] [2021-12-06 18:42:22,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731812321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:22,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:22,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:42:22,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428902634] [2021-12-06 18:42:22,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:22,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:42:22,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:42:22,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:42:22,053 INFO L87 Difference]: Start difference. First operand 65 states and 78 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 18:42:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:22,073 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-12-06 18:42:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:42:22,074 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 18:42:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:22,075 INFO L225 Difference]: With dead ends: 64 [2021-12-06 18:42:22,075 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 18:42:22,075 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 18:42:22,076 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:22,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 18:42:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-06 18:42:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-12-06 18:42:22,080 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2021-12-06 18:42:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:22,080 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-12-06 18:42:22,081 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 18:42:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-12-06 18:42:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:42:22,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:22,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:22,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:42:22,081 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 18:42:22,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:22,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20005052] [2021-12-06 18:42:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:22,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:22,138 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 18:42:22,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:22,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20005052] [2021-12-06 18:42:22,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20005052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:22,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022081072] [2021-12-06 18:42:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:22,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:22,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:22,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:22,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:42:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:42:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:22,262 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 18:42:22,268 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 18:42:22,320 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 18:42:22,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:22,482 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 18:42:22,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022081072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:22,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:22,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-06 18:42:22,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643468759] [2021-12-06 18:42:22,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:22,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:42:22,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:42:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:42:22,483 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:22,606 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2021-12-06 18:42:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:42:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:42:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:22,608 INFO L225 Difference]: With dead ends: 149 [2021-12-06 18:42:22,608 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 18:42:22,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:42:22,608 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 248 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:22,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 278 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 18:42:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2021-12-06 18:42:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-06 18:42:22,614 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-12-06 18:42:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:22,615 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-06 18:42:22,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-06 18:42:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 18:42:22,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:22,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:22,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:22,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:22,817 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2021-12-06 18:42:22,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:22,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445088198] [2021-12-06 18:42:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:22,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:22,845 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 18:42:22,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:22,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445088198] [2021-12-06 18:42:22,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445088198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:22,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:22,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:42:22,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366553667] [2021-12-06 18:42:22,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:22,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:42:22,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:42:22,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:42:22,847 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:22,871 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-06 18:42:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:42:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 18:42:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:22,872 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:42:22,872 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 18:42:22,873 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 18:42:22,873 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:22,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 18:42:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-06 18:42:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-06 18:42:22,877 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2021-12-06 18:42:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:22,878 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-06 18:42:22,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-06 18:42:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 18:42:22,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:22,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:22,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:42:22,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-06 18:42:22,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294012292] [2021-12-06 18:42:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:22,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:22,932 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 18:42:22,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294012292] [2021-12-06 18:42:22,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294012292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:22,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:22,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:42:22,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783515294] [2021-12-06 18:42:22,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:22,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:42:22,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:42:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:42:22,934 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:22,982 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-06 18:42:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:42:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 18:42:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:22,983 INFO L225 Difference]: With dead ends: 80 [2021-12-06 18:42:22,983 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 18:42:22,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:42:22,984 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:22,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 65 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 18:42:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-12-06 18:42:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 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 18:42:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-06 18:42:22,988 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2021-12-06 18:42:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:22,989 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-06 18:42:22,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-06 18:42:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:42:22,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:22,990 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:22,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:42:22,990 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:22,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-06 18:42:22,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:22,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580749300] [2021-12-06 18:42:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:22,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:23,044 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 18:42:23,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580749300] [2021-12-06 18:42:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580749300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496940657] [2021-12-06 18:42:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:23,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:23,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:23,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:42:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:42:23,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:23,099 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:23,099 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 18:42:23,158 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 18:42:23,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:23,304 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 18:42:23,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496940657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:23,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:23,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 18:42:23,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092261814] [2021-12-06 18:42:23,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:23,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:42:23,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:42:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:42:23,306 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:23,432 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-12-06 18:42:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:42:23,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 18:42:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:23,433 INFO L225 Difference]: With dead ends: 124 [2021-12-06 18:42:23,433 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 18:42:23,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:42:23,433 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 319 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:23,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 237 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 18:42:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2021-12-06 18:42:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-06 18:42:23,437 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2021-12-06 18:42:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:23,437 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-06 18:42:23,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-06 18:42:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:42:23,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:23,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:23,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:42:23,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:42:23,640 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2021-12-06 18:42:23,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:23,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168594912] [2021-12-06 18:42:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:23,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:23,793 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 18:42:23,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:23,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168594912] [2021-12-06 18:42:23,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168594912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:23,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:23,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:42:23,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471434461] [2021-12-06 18:42:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:23,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:42:23,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:42:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:42:23,795 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 18:42:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:23,817 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-06 18:42:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:42:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 18:42:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:23,817 INFO L225 Difference]: With dead ends: 56 [2021-12-06 18:42:23,817 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 18:42:23,818 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 18:42:23,818 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:23,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 18:42:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 18:42:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 18:42:23,820 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2021-12-06 18:42:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:23,820 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 18:42:23,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 18:42:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 18:42:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:42:23,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:23,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:23,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:42:23,821 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2021-12-06 18:42:23,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:23,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97166426] [2021-12-06 18:42:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:23,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:23,844 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 18:42:23,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:23,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97166426] [2021-12-06 18:42:23,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97166426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:23,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:23,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:42:23,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074829180] [2021-12-06 18:42:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:23,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:42:23,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:42:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:42:23,845 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:23,874 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-06 18:42:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:42:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:42:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:23,875 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:42:23,875 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 18:42:23,875 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 18:42:23,876 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:23,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 18:42:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-06 18:42:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-06 18:42:23,878 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2021-12-06 18:42:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:23,878 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-06 18:42:23,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-06 18:42:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:42:23,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:23,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:23,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:42:23,879 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:23,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2021-12-06 18:42:23,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512745798] [2021-12-06 18:42:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:23,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:23,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:23,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512745798] [2021-12-06 18:42:23,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512745798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:23,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:23,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:42:23,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497538950] [2021-12-06 18:42:23,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:23,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:42:23,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:42:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:42:23,931 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 18:42:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:23,980 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-12-06 18:42:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:42:23,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 18:42:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:23,981 INFO L225 Difference]: With dead ends: 62 [2021-12-06 18:42:23,981 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 18:42:23,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:42:23,982 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:23,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 62 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 18:42:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-12-06 18:42:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-06 18:42:23,984 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2021-12-06 18:42:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:23,984 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-06 18:42:23,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 18:42:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-06 18:42:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:42:23,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:23,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:23,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:42:23,985 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2021-12-06 18:42:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:23,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690962307] [2021-12-06 18:42:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:23,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:24,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690962307] [2021-12-06 18:42:24,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690962307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:24,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:24,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:42:24,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117191328] [2021-12-06 18:42:24,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:24,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:42:24,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:42:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:42:24,003 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:24,008 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-12-06 18:42:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:42:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 18:42:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:24,009 INFO L225 Difference]: With dead ends: 59 [2021-12-06 18:42:24,009 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 18:42:24,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:42:24,009 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:24,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 18:42:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-06 18:42:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-06 18:42:24,011 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2021-12-06 18:42:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:24,011 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-06 18:42:24,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-06 18:42:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 18:42:24,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:24,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:24,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:42:24,012 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2021-12-06 18:42:24,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:24,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979536858] [2021-12-06 18:42:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:24,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:24,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979536858] [2021-12-06 18:42:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979536858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:24,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:24,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:42:24,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827060499] [2021-12-06 18:42:24,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:24,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:42:24,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:42:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:42:24,089 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:24,138 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-12-06 18:42:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:42:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 18:42:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:24,138 INFO L225 Difference]: With dead ends: 71 [2021-12-06 18:42:24,138 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 18:42:24,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:42:24,139 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:24,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 157 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 18:42:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 18:42:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 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 18:42:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-06 18:42:24,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2021-12-06 18:42:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:24,141 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-06 18:42:24,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-06 18:42:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 18:42:24,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:24,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:24,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:42:24,142 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2021-12-06 18:42:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002689062] [2021-12-06 18:42:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:24,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:24,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002689062] [2021-12-06 18:42:24,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002689062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:24,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:24,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:42:24,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549945547] [2021-12-06 18:42:24,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:24,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:42:24,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:42:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:42:24,231 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:24,285 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-12-06 18:42:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:42:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 18:42:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:24,285 INFO L225 Difference]: With dead ends: 74 [2021-12-06 18:42:24,286 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 18:42:24,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:42:24,286 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:24,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 18:42:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-12-06 18:42:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 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 18:42:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-12-06 18:42:24,288 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2021-12-06 18:42:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:24,288 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-12-06 18:42:24,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-12-06 18:42:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:42:24,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:24,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:24,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:42:24,289 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2021-12-06 18:42:24,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:24,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708405646] [2021-12-06 18:42:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:24,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:24,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708405646] [2021-12-06 18:42:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708405646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:24,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:24,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:42:24,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31978702] [2021-12-06 18:42:24,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:42:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:42:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:42:24,359 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:24,453 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-12-06 18:42:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:42:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 18:42:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:24,454 INFO L225 Difference]: With dead ends: 75 [2021-12-06 18:42:24,454 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 18:42:24,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:42:24,455 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:24,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 217 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 18:42:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-12-06 18:42:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 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 18:42:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-12-06 18:42:24,458 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2021-12-06 18:42:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:24,459 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-12-06 18:42:24,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-12-06 18:42:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:42:24,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:24,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:24,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:42:24,460 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:24,460 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2021-12-06 18:42:24,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:24,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484736401] [2021-12-06 18:42:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:24,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:24,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484736401] [2021-12-06 18:42:24,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484736401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:24,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:24,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:42:24,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516395970] [2021-12-06 18:42:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:24,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:42:24,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:42:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:42:24,602 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:24,722 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-12-06 18:42:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:42:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 18:42:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:24,723 INFO L225 Difference]: With dead ends: 96 [2021-12-06 18:42:24,723 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 18:42:24,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:42:24,724 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 133 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:24,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 172 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 18:42:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2021-12-06 18:42:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-12-06 18:42:24,727 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2021-12-06 18:42:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:24,727 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-12-06 18:42:24,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-12-06 18:42:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:42:24,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:24,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:24,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:42:24,728 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2021-12-06 18:42:24,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2233564] [2021-12-06 18:42:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:24,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:24,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2233564] [2021-12-06 18:42:24,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2233564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:24,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:24,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:42:24,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919195954] [2021-12-06 18:42:24,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:24,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:42:24,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:42:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:42:24,785 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 18:42:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:24,893 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-12-06 18:42:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:42:24,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 27 [2021-12-06 18:42:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:24,894 INFO L225 Difference]: With dead ends: 75 [2021-12-06 18:42:24,894 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 18:42:24,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:42:24,894 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:24,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 142 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 18:42:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-12-06 18:42:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 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 18:42:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-06 18:42:24,896 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2021-12-06 18:42:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:24,896 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-06 18:42:24,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 18:42:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-06 18:42:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:42:24,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:24,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:24,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:42:24,897 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2021-12-06 18:42:24,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:24,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045589257] [2021-12-06 18:42:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:24,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:24,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045589257] [2021-12-06 18:42:24,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045589257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:24,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176107958] [2021-12-06 18:42:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:24,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:24,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:24,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:24,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:42:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:42:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:25,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:25,200 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 18:42:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:25,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176107958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:25,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:25,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-12-06 18:42:25,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054427306] [2021-12-06 18:42:25,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:25,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:42:25,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:42:25,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:42:25,223 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:25,351 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-12-06 18:42:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:42:25,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 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 18:42:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:25,351 INFO L225 Difference]: With dead ends: 69 [2021-12-06 18:42:25,352 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 18:42:25,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:42:25,352 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 291 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:25,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 145 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 18:42:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-12-06 18:42:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-06 18:42:25,354 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2021-12-06 18:42:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:25,354 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-06 18:42:25,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-06 18:42:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 18:42:25,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:25,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:25,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:42:25,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 18:42:25,557 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:25,558 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2021-12-06 18:42:25,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:25,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797812791] [2021-12-06 18:42:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:25,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:25,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:25,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797812791] [2021-12-06 18:42:25,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797812791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:25,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807377533] [2021-12-06 18:42:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:25,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:25,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:25,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:25,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:42:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:42:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:25,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:25,952 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 18:42:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:25,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807377533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:25,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:25,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-06 18:42:25,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576746405] [2021-12-06 18:42:25,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:25,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:42:25,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:42:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:42:25,971 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:26,082 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-12-06 18:42:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:42:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 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 33 [2021-12-06 18:42:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:26,083 INFO L225 Difference]: With dead ends: 86 [2021-12-06 18:42:26,083 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 18:42:26,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:42:26,083 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 346 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:26,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 147 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 18:42:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2021-12-06 18:42:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-12-06 18:42:26,085 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2021-12-06 18:42:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:26,086 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-12-06 18:42:26,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-12-06 18:42:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 18:42:26,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:26,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:26,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:42:26,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 18:42:26,287 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:26,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2021-12-06 18:42:26,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:26,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122591064] [2021-12-06 18:42:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:26,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:26,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122591064] [2021-12-06 18:42:26,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122591064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349732923] [2021-12-06 18:42:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:26,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:26,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:42:26,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 18:42:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:26,528 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 18:42:26,736 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 18:42:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:26,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:26,853 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 18:42:26,856 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 18:42:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:27,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349732923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:27,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:27,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2021-12-06 18:42:27,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942538512] [2021-12-06 18:42:27,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:27,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:42:27,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:27,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:42:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:42:27,010 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:27,249 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2021-12-06 18:42:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:42:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 18:42:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:27,250 INFO L225 Difference]: With dead ends: 106 [2021-12-06 18:42:27,250 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 18:42:27,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:42:27,251 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 213 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:27,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 319 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 208 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-12-06 18:42:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 18:42:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-12-06 18:42:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 95 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-12-06 18:42:27,255 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 36 [2021-12-06 18:42:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:27,255 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-12-06 18:42:27,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-12-06 18:42:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 18:42:27,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:27,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:27,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:42:27,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:42:27,457 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash -304963965, now seen corresponding path program 3 times [2021-12-06 18:42:27,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:27,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779730127] [2021-12-06 18:42:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:27,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:27,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779730127] [2021-12-06 18:42:27,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779730127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56926447] [2021-12-06 18:42:27,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:27,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:27,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:27,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:27,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:42:27,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:42:27,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:42:27,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:27,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:27,878 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 18:42:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:27,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56926447] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:27,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:27,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-06 18:42:27,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56667958] [2021-12-06 18:42:27,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:27,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:42:27,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:42:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:42:27,906 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 26 states, 25 states have (on average 3.8) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:28,155 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2021-12-06 18:42:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:42:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.8) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 18:42:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:28,157 INFO L225 Difference]: With dead ends: 149 [2021-12-06 18:42:28,157 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 18:42:28,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:42:28,158 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 279 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:28,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 346 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:42:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 18:42:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 108. [2021-12-06 18:42:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.1226415094339623) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2021-12-06 18:42:28,162 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 40 [2021-12-06 18:42:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:28,162 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2021-12-06 18:42:28,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.8) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2021-12-06 18:42:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 18:42:28,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:28,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:28,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:42:28,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:28,364 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2021-12-06 18:42:28,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:28,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999313957] [2021-12-06 18:42:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:28,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:28,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999313957] [2021-12-06 18:42:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999313957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234439325] [2021-12-06 18:42:28,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:28,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:28,529 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:28,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:42:28,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:28,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:28,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 18:42:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:28,592 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 18:42:28,695 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 18:42:28,727 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 18:42:29,541 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-06 18:42:29,541 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 48 treesize of output 20 [2021-12-06 18:42:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:29,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:29,882 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_323 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_323) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse0 (select v_ArrVal_323 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse2 (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (or (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))) (= .cse2 0) (not (= .cse0 .cse2)))))) is different from false [2021-12-06 18:42:29,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:29,889 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 72 treesize of output 50 [2021-12-06 18:42:29,901 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-06 18:42:29,901 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 93 treesize of output 88 [2021-12-06 18:42:29,914 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-06 18:42:29,914 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 60 treesize of output 62 [2021-12-06 18:42:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:30,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234439325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:30,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:30,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 20] total 45 [2021-12-06 18:42:30,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456766097] [2021-12-06 18:42:30,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:30,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:42:30,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:30,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:42:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1723, Unknown=1, NotChecked=84, Total=1980 [2021-12-06 18:42:30,117 INFO L87 Difference]: Start difference. First operand 108 states and 119 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 18:42:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:30,910 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2021-12-06 18:42:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:42:30,911 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 46 [2021-12-06 18:42:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:30,912 INFO L225 Difference]: With dead ends: 180 [2021-12-06 18:42:30,912 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 18:42:30,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=454, Invalid=3089, Unknown=1, NotChecked=116, Total=3660 [2021-12-06 18:42:30,913 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 179 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:30,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 509 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 395 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2021-12-06 18:42:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 18:42:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-12-06 18:42:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.1095890410958904) internal successors, (162), 147 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2021-12-06 18:42:30,916 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 46 [2021-12-06 18:42:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:30,917 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2021-12-06 18:42:30,917 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 18:42:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2021-12-06 18:42:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 18:42:30,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:30,917 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:42:30,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:31,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:42:31,118 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 4 times [2021-12-06 18:42:31,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587100786] [2021-12-06 18:42:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:31,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:31,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587100786] [2021-12-06 18:42:31,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587100786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592099216] [2021-12-06 18:42:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:42:31,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:31,462 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:31,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:42:31,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:42:31,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 18:42:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:31,522 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:31,522 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 18:42:31,639 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 18:42:31,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:31,895 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 18:42:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:31,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:32,187 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 18:42:32,189 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 18:42:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:32,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592099216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:32,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:32,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 41 [2021-12-06 18:42:32,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107110406] [2021-12-06 18:42:32,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:32,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:42:32,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:42:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:42:32,495 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:33,360 INFO L93 Difference]: Finished difference Result 211 states and 227 transitions. [2021-12-06 18:42:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 18:42:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-06 18:42:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:33,361 INFO L225 Difference]: With dead ends: 211 [2021-12-06 18:42:33,361 INFO L226 Difference]: Without dead ends: 186 [2021-12-06 18:42:33,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=406, Invalid=3500, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:42:33,363 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:33,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 463 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 350 Invalid, 0 Unknown, 200 Unchecked, 0.2s Time] [2021-12-06 18:42:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-06 18:42:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 175. [2021-12-06 18:42:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 1.1040462427745665) internal successors, (191), 174 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 191 transitions. [2021-12-06 18:42:33,366 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 191 transitions. Word has length 46 [2021-12-06 18:42:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:33,366 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 191 transitions. [2021-12-06 18:42:33,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 191 transitions. [2021-12-06 18:42:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:42:33,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:33,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:33,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:42:33,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:42:33,568 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 5 times [2021-12-06 18:42:33,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553050122] [2021-12-06 18:42:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:33,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:33,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:33,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553050122] [2021-12-06 18:42:33,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553050122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:33,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824425827] [2021-12-06 18:42:33,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:42:33,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:33,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:33,704 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:33,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:42:33,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:42:33,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 18:42:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:33,778 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:33,778 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 18:42:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:33,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:34,210 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 18:42:34,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824425827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:34,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:34,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-06 18:42:34,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416063616] [2021-12-06 18:42:34,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:34,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:42:34,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:34,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:42:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:42:34,212 INFO L87 Difference]: Start difference. First operand 175 states and 191 transitions. Second operand has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:34,509 INFO L93 Difference]: Finished difference Result 281 states and 303 transitions. [2021-12-06 18:42:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:42:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-06 18:42:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:34,511 INFO L225 Difference]: With dead ends: 281 [2021-12-06 18:42:34,511 INFO L226 Difference]: Without dead ends: 281 [2021-12-06 18:42:34,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:42:34,512 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 339 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:34,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 440 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:42:34,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-06 18:42:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 223. [2021-12-06 18:42:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 221 states have (on average 1.1131221719457014) internal successors, (246), 222 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 246 transitions. [2021-12-06 18:42:34,520 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 246 transitions. Word has length 50 [2021-12-06 18:42:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:34,520 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 246 transitions. [2021-12-06 18:42:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 246 transitions. [2021-12-06 18:42:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:42:34,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:34,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:34,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:42:34,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 18:42:34,723 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2021-12-06 18:42:34,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870589189] [2021-12-06 18:42:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:34,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:34,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870589189] [2021-12-06 18:42:34,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870589189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31974947] [2021-12-06 18:42:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:34,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:34,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:34,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:34,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:42:34,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:42:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:42:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:35,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:35,108 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 18:42:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:35,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31974947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:35,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:35,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2021-12-06 18:42:35,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365895697] [2021-12-06 18:42:35,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:35,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:42:35,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:42:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:42:35,129 INFO L87 Difference]: Start difference. First operand 223 states and 246 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 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 18:42:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:35,297 INFO L93 Difference]: Finished difference Result 366 states and 403 transitions. [2021-12-06 18:42:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:42:35,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 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 50 [2021-12-06 18:42:35,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:35,301 INFO L225 Difference]: With dead ends: 366 [2021-12-06 18:42:35,301 INFO L226 Difference]: Without dead ends: 366 [2021-12-06 18:42:35,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:42:35,302 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 285 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:35,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 347 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-06 18:42:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-12-06 18:42:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 292 states have (on average 1.1164383561643836) internal successors, (326), 293 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 326 transitions. [2021-12-06 18:42:35,307 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 326 transitions. Word has length 50 [2021-12-06 18:42:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:35,308 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 326 transitions. [2021-12-06 18:42:35,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 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 18:42:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 326 transitions. [2021-12-06 18:42:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 18:42:35,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:35,308 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:42:35,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:35,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:42:35,510 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:35,512 INFO L85 PathProgramCache]: Analyzing trace with hash 509273480, now seen corresponding path program 6 times [2021-12-06 18:42:35,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:35,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100252339] [2021-12-06 18:42:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:35,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:35,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100252339] [2021-12-06 18:42:35,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100252339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:35,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71850272] [2021-12-06 18:42:35,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:42:35,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:35,670 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:35,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:42:35,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:42:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:35,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:42:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:35,770 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:35,770 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 18:42:35,891 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 14 treesize of output 10 [2021-12-06 18:42:35,961 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 18:42:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:36,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:36,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 18:42:36,519 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:42:36,519 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 51 treesize of output 43 [2021-12-06 18:42:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:36,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71850272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:36,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:36,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 49 [2021-12-06 18:42:36,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603821179] [2021-12-06 18:42:36,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:36,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:42:36,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:42:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:42:36,757 INFO L87 Difference]: Start difference. First operand 294 states and 326 transitions. Second operand has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:37,638 INFO L93 Difference]: Finished difference Result 434 states and 471 transitions. [2021-12-06 18:42:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:42:37,639 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 18:42:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:37,640 INFO L225 Difference]: With dead ends: 434 [2021-12-06 18:42:37,640 INFO L226 Difference]: Without dead ends: 397 [2021-12-06 18:42:37,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=727, Invalid=4675, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 18:42:37,642 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 479 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:37,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 667 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 685 Invalid, 0 Unknown, 280 Unchecked, 0.2s Time] [2021-12-06 18:42:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-06 18:42:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2021-12-06 18:42:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 379 states have (on average 1.1108179419525066) internal successors, (421), 380 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 421 transitions. [2021-12-06 18:42:37,650 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 421 transitions. Word has length 56 [2021-12-06 18:42:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:37,650 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 421 transitions. [2021-12-06 18:42:37,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 421 transitions. [2021-12-06 18:42:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 18:42:37,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:37,651 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:42:37,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:42:37,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:37,851 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 223488613, now seen corresponding path program 7 times [2021-12-06 18:42:37,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:37,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71711900] [2021-12-06 18:42:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:37,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:37,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:37,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71711900] [2021-12-06 18:42:37,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71711900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:37,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525729411] [2021-12-06 18:42:37,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:42:37,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:37,975 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:37,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:42:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:38,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:42:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:38,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:38,355 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 18:42:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:38,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525729411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:38,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:38,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2021-12-06 18:42:38,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040479751] [2021-12-06 18:42:38,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:38,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 18:42:38,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 18:42:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:42:38,385 INFO L87 Difference]: Start difference. First operand 381 states and 421 transitions. Second operand has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:38,826 INFO L93 Difference]: Finished difference Result 573 states and 625 transitions. [2021-12-06 18:42:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:42:38,827 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 18:42:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:38,829 INFO L225 Difference]: With dead ends: 573 [2021-12-06 18:42:38,829 INFO L226 Difference]: Without dead ends: 573 [2021-12-06 18:42:38,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 18:42:38,830 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 468 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:38,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 708 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:42:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-12-06 18:42:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 473. [2021-12-06 18:42:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.118895966029724) internal successors, (527), 472 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 527 transitions. [2021-12-06 18:42:38,839 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 527 transitions. Word has length 60 [2021-12-06 18:42:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:38,839 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 527 transitions. [2021-12-06 18:42:38,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 527 transitions. [2021-12-06 18:42:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:42:38,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:38,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 18:42:38,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:42:39,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 18:42:39,040 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 4 times [2021-12-06 18:42:39,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240525983] [2021-12-06 18:42:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:39,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:39,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:39,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240525983] [2021-12-06 18:42:39,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240525983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:39,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254918461] [2021-12-06 18:42:39,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:42:39,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:39,696 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:39,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:42:39,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:42:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 18:42:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:39,770 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:39,770 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 18:42:39,779 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 10 treesize of output 8 [2021-12-06 18:42:39,975 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 18:42:40,020 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 18:42:41,018 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 18:42:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:41,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:41,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 17 [2021-12-06 18:42:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:41,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:42,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:42,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2021-12-06 18:42:42,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:42,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:42,720 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 89 treesize of output 92 [2021-12-06 18:42:42,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:42,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2021-12-06 18:42:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:43,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254918461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:43,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:43,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 22] total 60 [2021-12-06 18:42:43,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164869221] [2021-12-06 18:42:43,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:43,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:42:43,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:43,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:42:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=3292, Unknown=1, NotChecked=0, Total=3540 [2021-12-06 18:42:43,358 INFO L87 Difference]: Start difference. First operand 473 states and 527 transitions. Second operand has 60 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 60 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:44,646 INFO L93 Difference]: Finished difference Result 896 states and 1001 transitions. [2021-12-06 18:42:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:42:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 60 states have internal predecessors, (166), 0 states have call successors, (0), 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 63 [2021-12-06 18:42:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:44,649 INFO L225 Difference]: With dead ends: 896 [2021-12-06 18:42:44,649 INFO L226 Difference]: Without dead ends: 850 [2021-12-06 18:42:44,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=563, Invalid=6576, Unknown=1, NotChecked=0, Total=7140 [2021-12-06 18:42:44,651 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 160 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:44,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 692 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 358 Invalid, 0 Unknown, 284 Unchecked, 0.1s Time] [2021-12-06 18:42:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-12-06 18:42:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 839. [2021-12-06 18:42:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 837 states have (on average 1.1230585424133812) internal successors, (940), 838 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 940 transitions. [2021-12-06 18:42:44,664 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 940 transitions. Word has length 63 [2021-12-06 18:42:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:44,664 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 940 transitions. [2021-12-06 18:42:44,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 60 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 940 transitions. [2021-12-06 18:42:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:42:44,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:44,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:44,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:44,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:44,866 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 1 times [2021-12-06 18:42:44,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763342391] [2021-12-06 18:42:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:44,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:42:45,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763342391] [2021-12-06 18:42:45,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763342391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376678303] [2021-12-06 18:42:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:45,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:45,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:45,285 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:45,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:42:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 18:42:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:45,440 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 18:42:45,624 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 18:42:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:42:45,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:45,711 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 18:42:45,712 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 26 treesize of output 22 [2021-12-06 18:42:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:42:45,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376678303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:45,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:45,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 33 [2021-12-06 18:42:45,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220530378] [2021-12-06 18:42:45,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:45,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:42:45,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:42:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:42:45,809 INFO L87 Difference]: Start difference. First operand 839 states and 940 transitions. Second operand has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:47,252 INFO L93 Difference]: Finished difference Result 938 states and 1035 transitions. [2021-12-06 18:42:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:42:47,252 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 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 63 [2021-12-06 18:42:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:47,256 INFO L225 Difference]: With dead ends: 938 [2021-12-06 18:42:47,256 INFO L226 Difference]: Without dead ends: 929 [2021-12-06 18:42:47,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=450, Invalid=3456, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:42:47,257 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 473 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:47,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 993 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 853 Invalid, 0 Unknown, 289 Unchecked, 0.3s Time] [2021-12-06 18:42:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-12-06 18:42:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 900. [2021-12-06 18:42:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 898 states have (on average 1.1180400890868596) internal successors, (1004), 899 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1004 transitions. [2021-12-06 18:42:47,272 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1004 transitions. Word has length 63 [2021-12-06 18:42:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:47,272 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1004 transitions. [2021-12-06 18:42:47,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1004 transitions. [2021-12-06 18:42:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:42:47,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:47,273 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:42:47,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:42:47,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:47,474 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 8 times [2021-12-06 18:42:47,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:47,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979650299] [2021-12-06 18:42:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:47,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:47,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979650299] [2021-12-06 18:42:47,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979650299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993947802] [2021-12-06 18:42:47,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:47,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:47,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:47,639 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:47,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:42:47,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 18:42:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:47,787 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 18:42:48,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:48,469 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 18 [2021-12-06 18:42:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:48,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:49,101 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 18:42:49,106 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 15 treesize of output 11 [2021-12-06 18:42:49,109 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 26 treesize of output 22 [2021-12-06 18:42:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:49,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993947802] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:49,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:49,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 48 [2021-12-06 18:42:49,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698185556] [2021-12-06 18:42:49,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:49,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 18:42:49,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 18:42:49,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2072, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:42:49,138 INFO L87 Difference]: Start difference. First operand 900 states and 1004 transitions. Second operand has 48 states, 48 states have (on average 3.4375) internal successors, (165), 48 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 18:42:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:50,349 INFO L93 Difference]: Finished difference Result 1105 states and 1216 transitions. [2021-12-06 18:42:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 18:42:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4375) internal successors, (165), 48 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 66 [2021-12-06 18:42:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:50,353 INFO L225 Difference]: With dead ends: 1105 [2021-12-06 18:42:50,353 INFO L226 Difference]: Without dead ends: 1065 [2021-12-06 18:42:50,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=395, Invalid=4161, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:42:50,355 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 435 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:50,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1908 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1603 Invalid, 0 Unknown, 478 Unchecked, 0.4s Time] [2021-12-06 18:42:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-12-06 18:42:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 992. [2021-12-06 18:42:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 990 states have (on average 1.1171717171717173) internal successors, (1106), 991 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1106 transitions. [2021-12-06 18:42:50,369 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1106 transitions. Word has length 66 [2021-12-06 18:42:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:50,369 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1106 transitions. [2021-12-06 18:42:50,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4375) internal successors, (165), 48 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 18:42:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1106 transitions. [2021-12-06 18:42:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 18:42:50,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:50,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 18:42:50,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:42:50,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 18:42:50,572 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1668022213, now seen corresponding path program 5 times [2021-12-06 18:42:50,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:50,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180391083] [2021-12-06 18:42:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:50,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:50,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:50,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180391083] [2021-12-06 18:42:50,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180391083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:50,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464482740] [2021-12-06 18:42:50,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:42:50,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:50,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:50,692 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:50,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:42:50,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:42:50,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:50,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 18:42:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:50,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:50,792 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 18:42:50,794 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 10 treesize of output 8 [2021-12-06 18:42:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:51,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:51,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464482740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:51,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:51,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2021-12-06 18:42:51,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456889596] [2021-12-06 18:42:51,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:51,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:42:51,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:51,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:42:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:42:51,309 INFO L87 Difference]: Start difference. First operand 992 states and 1106 transitions. Second operand has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:51,706 INFO L93 Difference]: Finished difference Result 1299 states and 1442 transitions. [2021-12-06 18:42:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:42:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 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 67 [2021-12-06 18:42:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:51,710 INFO L225 Difference]: With dead ends: 1299 [2021-12-06 18:42:51,710 INFO L226 Difference]: Without dead ends: 1299 [2021-12-06 18:42:51,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:42:51,711 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 515 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:51,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 683 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:42:51,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-12-06 18:42:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1145. [2021-12-06 18:42:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1143 states have (on average 1.1172353455818023) internal successors, (1277), 1144 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1277 transitions. [2021-12-06 18:42:51,736 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1277 transitions. Word has length 67 [2021-12-06 18:42:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:51,736 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1277 transitions. [2021-12-06 18:42:51,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1277 transitions. [2021-12-06 18:42:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 18:42:51,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:51,738 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:51,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:42:51,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 18:42:51,940 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:51,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1190420041, now seen corresponding path program 2 times [2021-12-06 18:42:51,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:51,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273938164] [2021-12-06 18:42:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:51,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:42:52,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:52,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273938164] [2021-12-06 18:42:52,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273938164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:52,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817382362] [2021-12-06 18:42:52,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:52,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:52,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:52,402 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:52,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:42:52,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:52,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 18:42:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:52,551 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 18:42:52,769 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 18:42:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:42:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:52,862 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 18:42:52,864 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 18:42:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:42:52,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817382362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:52,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:52,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 33 [2021-12-06 18:42:52,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027653477] [2021-12-06 18:42:52,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:52,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:42:52,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:42:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:42:52,964 INFO L87 Difference]: Start difference. First operand 1145 states and 1277 transitions. Second operand has 33 states, 33 states have (on average 4.090909090909091) internal successors, (135), 33 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 18:42:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:54,478 INFO L93 Difference]: Finished difference Result 1155 states and 1264 transitions. [2021-12-06 18:42:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:42:54,478 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.090909090909091) internal successors, (135), 33 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 69 [2021-12-06 18:42:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:54,482 INFO L225 Difference]: With dead ends: 1155 [2021-12-06 18:42:54,482 INFO L226 Difference]: Without dead ends: 1140 [2021-12-06 18:42:54,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=511, Invalid=3649, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 18:42:54,484 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 512 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:54,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 979 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 972 Invalid, 0 Unknown, 312 Unchecked, 0.3s Time] [2021-12-06 18:42:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-12-06 18:42:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1030. [2021-12-06 18:42:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1028 states have (on average 1.1118677042801557) internal successors, (1143), 1029 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1143 transitions. [2021-12-06 18:42:54,498 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1143 transitions. Word has length 69 [2021-12-06 18:42:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:54,498 INFO L470 AbstractCegarLoop]: Abstraction has 1030 states and 1143 transitions. [2021-12-06 18:42:54,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.090909090909091) internal successors, (135), 33 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 18:42:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1143 transitions. [2021-12-06 18:42:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:42:54,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:54,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:54,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:42:54,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:54,701 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1503497039, now seen corresponding path program 1 times [2021-12-06 18:42:54,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:54,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672254122] [2021-12-06 18:42:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:54,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:42:54,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:54,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672254122] [2021-12-06 18:42:54,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672254122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:54,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194346945] [2021-12-06 18:42:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:54,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:54,980 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:54,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:42:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:42:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:55,053 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 18:42:55,187 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 18:42:55,217 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 18:42:55,472 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 18:42:55,472 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 18:42:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:42:55,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:55,629 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_725 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_725) |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 18:42:55,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:55,634 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 18:42:55,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:55,638 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 18:42:55,640 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 18:42:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:42:55,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194346945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:55,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:55,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 39 [2021-12-06 18:42:55,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976601919] [2021-12-06 18:42:55,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:55,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 18:42:55,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 18:42:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1297, Unknown=1, NotChecked=72, Total=1482 [2021-12-06 18:42:55,788 INFO L87 Difference]: Start difference. First operand 1030 states and 1143 transitions. Second operand has 39 states, 39 states have (on average 4.051282051282051) internal successors, (158), 39 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:56,359 INFO L93 Difference]: Finished difference Result 1026 states and 1120 transitions. [2021-12-06 18:42:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:42:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.051282051282051) internal successors, (158), 39 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:42:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:56,362 INFO L225 Difference]: With dead ends: 1026 [2021-12-06 18:42:56,362 INFO L226 Difference]: Without dead ends: 903 [2021-12-06 18:42:56,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=2594, Unknown=1, NotChecked=104, Total=2970 [2021-12-06 18:42:56,363 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 105 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:56,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 789 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 719 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2021-12-06 18:42:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-12-06 18:42:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 771. [2021-12-06 18:42:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 769 states have (on average 1.1092327698309492) internal successors, (853), 770 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 853 transitions. [2021-12-06 18:42:56,372 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 853 transitions. Word has length 73 [2021-12-06 18:42:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:56,372 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 853 transitions. [2021-12-06 18:42:56,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.051282051282051) internal successors, (158), 39 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 853 transitions. [2021-12-06 18:42:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:42:56,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:56,373 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:56,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:42:56,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:56,574 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:56,575 INFO L85 PathProgramCache]: Analyzing trace with hash 553451124, now seen corresponding path program 3 times [2021-12-06 18:42:56,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:56,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054792238] [2021-12-06 18:42:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:56,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:42:57,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054792238] [2021-12-06 18:42:57,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054792238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676369158] [2021-12-06 18:42:57,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:57,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:57,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:57,053 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:57,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:42:57,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 18:42:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:57,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:42:57,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:57,272 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 18:42:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:42:57,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:57,604 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 18:42:57,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 18:42:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:42:57,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676369158] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:57,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:57,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 38 [2021-12-06 18:42:57,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833692503] [2021-12-06 18:42:57,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 18:42:57,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 18:42:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 18:42:57,711 INFO L87 Difference]: Start difference. First operand 771 states and 853 transitions. Second operand has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 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 18:42:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:59,482 INFO L93 Difference]: Finished difference Result 954 states and 1038 transitions. [2021-12-06 18:42:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:42:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 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) Word has length 73 [2021-12-06 18:42:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:59,485 INFO L225 Difference]: With dead ends: 954 [2021-12-06 18:42:59,485 INFO L226 Difference]: Without dead ends: 893 [2021-12-06 18:42:59,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=560, Invalid=4552, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:42:59,486 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 569 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:59,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 2078 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2025 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2021-12-06 18:42:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-12-06 18:42:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 824. [2021-12-06 18:42:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 822 states have (on average 1.108272506082725) internal successors, (911), 823 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 911 transitions. [2021-12-06 18:42:59,495 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 911 transitions. Word has length 73 [2021-12-06 18:42:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:59,495 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 911 transitions. [2021-12-06 18:42:59,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 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 18:42:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 911 transitions. [2021-12-06 18:42:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 18:42:59,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:59,496 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:42:59,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:42:59,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 18:42:59,697 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:42:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:59,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 9 times [2021-12-06 18:42:59,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:59,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504184540] [2021-12-06 18:42:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:59,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:59,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:59,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504184540] [2021-12-06 18:42:59,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504184540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:59,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947763464] [2021-12-06 18:42:59,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:59,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:59,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:59,895 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:59,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:43:00,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 18:43:00,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:00,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:43:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:00,166 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 18:43:00,336 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 18:43:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:00,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:00,447 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 18:43:00,448 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 18:43:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:00,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947763464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:00,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:00,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 37 [2021-12-06 18:43:00,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142151211] [2021-12-06 18:43:00,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:00,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 18:43:00,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 18:43:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:43:00,559 INFO L87 Difference]: Start difference. First operand 824 states and 911 transitions. Second operand has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:01,371 INFO L93 Difference]: Finished difference Result 1391 states and 1517 transitions. [2021-12-06 18:43:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:43:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 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 76 [2021-12-06 18:43:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:01,376 INFO L225 Difference]: With dead ends: 1391 [2021-12-06 18:43:01,376 INFO L226 Difference]: Without dead ends: 1339 [2021-12-06 18:43:01,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:43:01,377 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 709 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:01,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 1888 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1514 Invalid, 0 Unknown, 125 Unchecked, 0.5s Time] [2021-12-06 18:43:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-12-06 18:43:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1063. [2021-12-06 18:43:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1061 states have (on average 1.1083883129123469) internal successors, (1176), 1062 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1176 transitions. [2021-12-06 18:43:01,388 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1176 transitions. Word has length 76 [2021-12-06 18:43:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:01,388 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1176 transitions. [2021-12-06 18:43:01,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1176 transitions. [2021-12-06 18:43:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 18:43:01,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:01,390 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:43:01,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:43:01,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 18:43:01,591 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash -882077113, now seen corresponding path program 10 times [2021-12-06 18:43:01,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:01,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519145337] [2021-12-06 18:43:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:01,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:01,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:01,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519145337] [2021-12-06 18:43:01,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519145337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:01,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144729137] [2021-12-06 18:43:01,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:43:01,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:01,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:01,810 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:01,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:43:01,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:43:01,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:01,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 18:43:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:01,900 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:01,900 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 18:43:02,117 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 18:43:02,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:02,493 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 19 treesize of output 19 [2021-12-06 18:43:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 50 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:02,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:03,172 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 18:43:03,174 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 18:43:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:03,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144729137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:03,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:03,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 59 [2021-12-06 18:43:03,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247926568] [2021-12-06 18:43:03,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:03,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:43:03,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:03,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:43:03,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=3187, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:43:03,924 INFO L87 Difference]: Start difference. First operand 1063 states and 1176 transitions. Second operand has 60 states, 59 states have (on average 3.9322033898305087) internal successors, (232), 60 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:05,901 INFO L93 Difference]: Finished difference Result 1423 states and 1554 transitions. [2021-12-06 18:43:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:43:05,902 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.9322033898305087) internal successors, (232), 60 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 18:43:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:05,906 INFO L225 Difference]: With dead ends: 1423 [2021-12-06 18:43:05,906 INFO L226 Difference]: Without dead ends: 1423 [2021-12-06 18:43:05,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1601, Invalid=7141, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:43:05,907 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1015 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:05,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 1989 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2726 Invalid, 0 Unknown, 148 Unchecked, 0.9s Time] [2021-12-06 18:43:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-12-06 18:43:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1099. [2021-12-06 18:43:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1097 states have (on average 1.1084776663628078) internal successors, (1216), 1098 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1216 transitions. [2021-12-06 18:43:05,920 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1216 transitions. Word has length 80 [2021-12-06 18:43:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:05,920 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1216 transitions. [2021-12-06 18:43:05,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.9322033898305087) internal successors, (232), 60 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1216 transitions. [2021-12-06 18:43:05,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 18:43:05,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:05,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 18:43:05,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 18:43:06,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:06,123 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2132340658, now seen corresponding path program 6 times [2021-12-06 18:43:06,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:06,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756604727] [2021-12-06 18:43:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:06,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:06,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:06,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756604727] [2021-12-06 18:43:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756604727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:06,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109461704] [2021-12-06 18:43:06,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:43:06,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:06,439 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:06,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:43:06,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:43:06,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 18:43:06,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:06,552 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:06,552 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 18:43:06,753 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 18:43:06,808 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-12-06 18:43:06,808 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 18:43:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:08,928 INFO L354 Elim1Store]: treesize reduction 83, result has 36.6 percent of original size [2021-12-06 18:43:08,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 53 treesize of output 68 [2021-12-06 18:43:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:09,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:10,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:10,338 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-12-06 18:43:10,338 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 467 treesize of output 430 [2021-12-06 18:43:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:11,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109461704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:11,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:11,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 65 [2021-12-06 18:43:11,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404253198] [2021-12-06 18:43:11,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:11,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 18:43:11,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 18:43:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=3913, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 18:43:11,253 INFO L87 Difference]: Start difference. First operand 1099 states and 1216 transitions. Second operand has 65 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:13,000 INFO L93 Difference]: Finished difference Result 1755 states and 1926 transitions. [2021-12-06 18:43:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:43:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 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 80 [2021-12-06 18:43:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:13,006 INFO L225 Difference]: With dead ends: 1755 [2021-12-06 18:43:13,006 INFO L226 Difference]: Without dead ends: 1682 [2021-12-06 18:43:13,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=480, Invalid=7710, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 18:43:13,007 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 137 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:13,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1089 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 769 Invalid, 0 Unknown, 506 Unchecked, 0.3s Time] [2021-12-06 18:43:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-12-06 18:43:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1659. [2021-12-06 18:43:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1657 states have (on average 1.1050090525045262) internal successors, (1831), 1658 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 1831 transitions. [2021-12-06 18:43:13,025 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 1831 transitions. Word has length 80 [2021-12-06 18:43:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:13,026 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 1831 transitions. [2021-12-06 18:43:13,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 1831 transitions. [2021-12-06 18:43:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:43:13,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:13,027 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:13,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 18:43:13,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 18:43:13,228 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:13,230 INFO L85 PathProgramCache]: Analyzing trace with hash 462022027, now seen corresponding path program 4 times [2021-12-06 18:43:13,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:13,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550868127] [2021-12-06 18:43:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:13,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:13,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:13,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550868127] [2021-12-06 18:43:13,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550868127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:13,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212087813] [2021-12-06 18:43:13,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:43:13,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:13,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:13,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:13,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:43:13,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:43:13,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:13,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 18:43:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:13,488 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:13,489 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 18:43:13,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:43:14,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:14,058 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 18:43:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 61 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:14,427 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 18:43:14,429 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 18:43:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 54 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212087813] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:14,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:14,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 49 [2021-12-06 18:43:14,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091805093] [2021-12-06 18:43:14,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:14,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:43:14,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:43:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:43:14,823 INFO L87 Difference]: Start difference. First operand 1659 states and 1831 transitions. Second operand has 49 states, 49 states have (on average 4.36734693877551) internal successors, (214), 49 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 18:43:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:15,858 INFO L93 Difference]: Finished difference Result 1972 states and 2161 transitions. [2021-12-06 18:43:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:43:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.36734693877551) internal successors, (214), 49 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 83 [2021-12-06 18:43:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:15,865 INFO L225 Difference]: With dead ends: 1972 [2021-12-06 18:43:15,865 INFO L226 Difference]: Without dead ends: 1926 [2021-12-06 18:43:15,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=597, Invalid=4953, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 18:43:15,866 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 150 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:15,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 930 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 549 Invalid, 0 Unknown, 175 Unchecked, 0.1s Time] [2021-12-06 18:43:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-12-06 18:43:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1800. [2021-12-06 18:43:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.103448275862069) internal successors, (1984), 1799 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 1984 transitions. [2021-12-06 18:43:15,883 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 1984 transitions. Word has length 83 [2021-12-06 18:43:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:15,884 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 1984 transitions. [2021-12-06 18:43:15,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.36734693877551) internal successors, (214), 49 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 18:43:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 1984 transitions. [2021-12-06 18:43:15,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:43:15,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:15,885 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 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 18:43:15,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:16,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:16,086 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:16,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1768453533, now seen corresponding path program 5 times [2021-12-06 18:43:16,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:16,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613476089] [2021-12-06 18:43:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:16,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 101 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:16,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613476089] [2021-12-06 18:43:16,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613476089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239627678] [2021-12-06 18:43:16,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:43:16,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:16,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:16,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:16,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:43:16,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 18:43:16,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:43:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:16,739 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:16,739 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 18:43:16,906 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 18:43:17,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:17,345 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 18:43:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:43:17,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:17,987 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 13 [2021-12-06 18:43:17,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 18:43:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 92 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:43:18,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239627678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:18,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:18,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 16] total 53 [2021-12-06 18:43:18,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549798248] [2021-12-06 18:43:18,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:18,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:43:18,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:43:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2556, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:43:18,304 INFO L87 Difference]: Start difference. First operand 1800 states and 1984 transitions. Second operand has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 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 18:43:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:22,417 INFO L93 Difference]: Finished difference Result 2234 states and 2440 transitions. [2021-12-06 18:43:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 18:43:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 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) Word has length 83 [2021-12-06 18:43:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:22,424 INFO L225 Difference]: With dead ends: 2234 [2021-12-06 18:43:22,424 INFO L226 Difference]: Without dead ends: 2225 [2021-12-06 18:43:22,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1446, Invalid=12126, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 18:43:22,425 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 651 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 3380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1313 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:22,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 2098 Invalid, 3380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2033 Invalid, 0 Unknown, 1313 Unchecked, 0.8s Time] [2021-12-06 18:43:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-12-06 18:43:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1622. [2021-12-06 18:43:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1620 states have (on average 1.1006172839506172) internal successors, (1783), 1621 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 1783 transitions. [2021-12-06 18:43:22,446 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 1783 transitions. Word has length 83 [2021-12-06 18:43:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:22,446 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 1783 transitions. [2021-12-06 18:43:22,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 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 18:43:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 1783 transitions. [2021-12-06 18:43:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 18:43:22,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:22,448 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 18:43:22,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:43:22,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:22,648 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1003116751, now seen corresponding path program 7 times [2021-12-06 18:43:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:22,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534777205] [2021-12-06 18:43:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:22,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:22,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534777205] [2021-12-06 18:43:22,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534777205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193818851] [2021-12-06 18:43:22,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:43:22,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:22,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:22,782 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:22,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:43:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:43:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:23,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:23,286 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 18:43:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:23,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193818851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:23,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:23,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2021-12-06 18:43:23,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879670041] [2021-12-06 18:43:23,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:43:23,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:43:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-12-06 18:43:23,318 INFO L87 Difference]: Start difference. First operand 1622 states and 1783 transitions. Second operand has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 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 18:43:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:23,609 INFO L93 Difference]: Finished difference Result 2192 states and 2407 transitions. [2021-12-06 18:43:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:43:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 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 84 [2021-12-06 18:43:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:23,616 INFO L225 Difference]: With dead ends: 2192 [2021-12-06 18:43:23,616 INFO L226 Difference]: Without dead ends: 2192 [2021-12-06 18:43:23,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 18:43:23,617 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 634 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:23,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 674 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:43:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-12-06 18:43:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1798. [2021-12-06 18:43:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1796 states have (on average 1.1007795100222717) internal successors, (1977), 1797 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 1977 transitions. [2021-12-06 18:43:23,635 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 1977 transitions. Word has length 84 [2021-12-06 18:43:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:23,635 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 1977 transitions. [2021-12-06 18:43:23,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 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 18:43:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 1977 transitions. [2021-12-06 18:43:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:43:23,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:23,637 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:23,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:23,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 18:43:23,838 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2141774194, now seen corresponding path program 6 times [2021-12-06 18:43:23,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:23,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841435343] [2021-12-06 18:43:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:23,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:24,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841435343] [2021-12-06 18:43:24,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841435343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543951041] [2021-12-06 18:43:24,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:43:24,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:24,001 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:24,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 18:43:24,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 18:43:24,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:43:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 28 proven. 115 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:24,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:24,537 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 18:43:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 28 proven. 115 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:24,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543951041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:24,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:24,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-12-06 18:43:24,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268315372] [2021-12-06 18:43:24,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:24,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:43:24,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:24,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:43:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:43:24,571 INFO L87 Difference]: Start difference. First operand 1798 states and 1977 transitions. Second operand has 41 states, 40 states have (on average 5.225) internal successors, (209), 41 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:25,038 INFO L93 Difference]: Finished difference Result 2768 states and 3017 transitions. [2021-12-06 18:43:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:43:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 5.225) internal successors, (209), 41 states have internal predecessors, (209), 0 states have call successors, (0), 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 87 [2021-12-06 18:43:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:25,050 INFO L225 Difference]: With dead ends: 2768 [2021-12-06 18:43:25,050 INFO L226 Difference]: Without dead ends: 2673 [2021-12-06 18:43:25,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:43:25,050 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 516 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:25,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 685 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:43:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2021-12-06 18:43:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 1993. [2021-12-06 18:43:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1991 states have (on average 1.1049723756906078) internal successors, (2200), 1992 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2200 transitions. [2021-12-06 18:43:25,070 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2200 transitions. Word has length 87 [2021-12-06 18:43:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:25,070 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2200 transitions. [2021-12-06 18:43:25,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 5.225) internal successors, (209), 41 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2200 transitions. [2021-12-06 18:43:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 18:43:25,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:25,072 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:25,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 18:43:25,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:25,273 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1004507895, now seen corresponding path program 7 times [2021-12-06 18:43:25,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:25,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966822378] [2021-12-06 18:43:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:25,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:43:25,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966822378] [2021-12-06 18:43:25,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966822378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363433224] [2021-12-06 18:43:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:43:25,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:25,452 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:25,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 18:43:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:43:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:43:25,840 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 18:43:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:43:25,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:25,950 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 18:43:25,951 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 18:43:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:43:26,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363433224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:26,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:26,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2021-12-06 18:43:26,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297537163] [2021-12-06 18:43:26,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:26,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:43:26,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:43:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:43:26,036 INFO L87 Difference]: Start difference. First operand 1993 states and 2200 transitions. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:26,559 INFO L93 Difference]: Finished difference Result 2321 states and 2536 transitions. [2021-12-06 18:43:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:43:26,559 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 18:43:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:26,566 INFO L225 Difference]: With dead ends: 2321 [2021-12-06 18:43:26,566 INFO L226 Difference]: Without dead ends: 2231 [2021-12-06 18:43:26,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:43:26,566 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 516 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:26,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 1228 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:43:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-12-06 18:43:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1952. [2021-12-06 18:43:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1950 states have (on average 1.1046153846153846) internal successors, (2154), 1951 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2154 transitions. [2021-12-06 18:43:26,584 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2154 transitions. Word has length 89 [2021-12-06 18:43:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:26,584 INFO L470 AbstractCegarLoop]: Abstraction has 1952 states and 2154 transitions. [2021-12-06 18:43:26,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2154 transitions. [2021-12-06 18:43:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 18:43:26,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:26,586 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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 18:43:26,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:26,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:26,787 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash -298195357, now seen corresponding path program 2 times [2021-12-06 18:43:26,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:26,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609953851] [2021-12-06 18:43:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:26,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:43:27,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609953851] [2021-12-06 18:43:27,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609953851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918136871] [2021-12-06 18:43:27,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:43:27,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:27,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:27,402 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:27,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 18:43:27,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:43:27,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:43:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:27,496 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 18:43:27,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:43:27,734 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 14 treesize of output 16 [2021-12-06 18:43:27,907 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 18:43:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:43:27,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:28,066 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1163 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1163) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)))) is different from false [2021-12-06 18:43:28,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:28,070 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 18:43:28,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:28,073 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 18:43:28,075 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 18:43:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:43:28,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918136871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:28,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:28,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15, 15] total 51 [2021-12-06 18:43:28,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962130639] [2021-12-06 18:43:28,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:28,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:43:28,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:43:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2308, Unknown=1, NotChecked=96, Total=2550 [2021-12-06 18:43:28,302 INFO L87 Difference]: Start difference. First operand 1952 states and 2154 transitions. Second operand has 51 states, 51 states have (on average 4.1568627450980395) internal successors, (212), 51 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:30,402 INFO L93 Difference]: Finished difference Result 2145 states and 2342 transitions. [2021-12-06 18:43:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:43:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.1568627450980395) internal successors, (212), 51 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-06 18:43:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:30,408 INFO L225 Difference]: With dead ends: 2145 [2021-12-06 18:43:30,408 INFO L226 Difference]: Without dead ends: 1622 [2021-12-06 18:43:30,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=834, Invalid=7001, Unknown=1, NotChecked=174, Total=8010 [2021-12-06 18:43:30,409 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 856 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:30,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 1994 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2393 Invalid, 0 Unknown, 197 Unchecked, 0.7s Time] [2021-12-06 18:43:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-06 18:43:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1451. [2021-12-06 18:43:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1449 states have (on average 1.1097308488612836) internal successors, (1608), 1450 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1608 transitions. [2021-12-06 18:43:30,421 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1608 transitions. Word has length 90 [2021-12-06 18:43:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:30,421 INFO L470 AbstractCegarLoop]: Abstraction has 1451 states and 1608 transitions. [2021-12-06 18:43:30,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.1568627450980395) internal successors, (212), 51 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1608 transitions. [2021-12-06 18:43:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 18:43:30,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:30,422 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:30,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 18:43:30,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 18:43:30,623 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:30,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1216550895, now seen corresponding path program 11 times [2021-12-06 18:43:30,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:30,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255939652] [2021-12-06 18:43:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:30,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 139 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:30,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:30,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255939652] [2021-12-06 18:43:30,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255939652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734537731] [2021-12-06 18:43:30,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:43:30,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:30,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:30,799 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:30,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 18:43:30,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 18:43:30,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:30,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:43:30,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:30,921 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:30,921 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 18:43:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 176 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:31,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 176 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:31,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734537731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:31,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:31,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2021-12-06 18:43:31,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916904129] [2021-12-06 18:43:31,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:31,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:43:31,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:43:31,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1987, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:43:31,668 INFO L87 Difference]: Start difference. First operand 1451 states and 1608 transitions. Second operand has 49 states, 49 states have (on average 4.469387755102041) internal successors, (219), 49 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 18:43:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:33,098 INFO L93 Difference]: Finished difference Result 2572 states and 2793 transitions. [2021-12-06 18:43:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:43:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.469387755102041) internal successors, (219), 49 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 92 [2021-12-06 18:43:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:33,106 INFO L225 Difference]: With dead ends: 2572 [2021-12-06 18:43:33,107 INFO L226 Difference]: Without dead ends: 2519 [2021-12-06 18:43:33,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2363, Invalid=7339, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 18:43:33,107 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1373 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:33,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 967 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:43:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-12-06 18:43:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1957. [2021-12-06 18:43:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.1196930946291561) internal successors, (2189), 1956 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2189 transitions. [2021-12-06 18:43:33,124 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2189 transitions. Word has length 92 [2021-12-06 18:43:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:33,124 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 2189 transitions. [2021-12-06 18:43:33,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.469387755102041) internal successors, (219), 49 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 18:43:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2189 transitions. [2021-12-06 18:43:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:43:33,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:33,125 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 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 18:43:33,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:33,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:33,327 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2081958086, now seen corresponding path program 8 times [2021-12-06 18:43:33,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978900397] [2021-12-06 18:43:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:33,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 58 proven. 86 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:43:33,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:33,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978900397] [2021-12-06 18:43:33,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978900397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:33,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573755091] [2021-12-06 18:43:33,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:43:33,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:33,448 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:33,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 18:43:33,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:43:33,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:33,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:43:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:33,537 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:33,537 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 18:43:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 77 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:43:33,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 73 proven. 71 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:43:33,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573755091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:33,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:33,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2021-12-06 18:43:33,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246467432] [2021-12-06 18:43:33,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:33,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:43:33,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:33,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:43:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:43:33,944 INFO L87 Difference]: Start difference. First operand 1957 states and 2189 transitions. Second operand has 33 states, 33 states have (on average 5.03030303030303) internal successors, (166), 33 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:34,369 INFO L93 Difference]: Finished difference Result 1977 states and 2182 transitions. [2021-12-06 18:43:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:43:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.03030303030303) internal successors, (166), 33 states have internal predecessors, (166), 0 states have call successors, (0), 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 18:43:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:34,372 INFO L225 Difference]: With dead ends: 1977 [2021-12-06 18:43:34,372 INFO L226 Difference]: Without dead ends: 1973 [2021-12-06 18:43:34,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=580, Invalid=1970, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:43:34,373 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 623 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:34,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 350 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:43:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-12-06 18:43:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1709. [2021-12-06 18:43:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1707 states have (on average 1.1130638547158758) internal successors, (1900), 1708 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 1900 transitions. [2021-12-06 18:43:34,387 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 1900 transitions. Word has length 93 [2021-12-06 18:43:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:34,388 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 1900 transitions. [2021-12-06 18:43:34,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.03030303030303) internal successors, (166), 33 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 1900 transitions. [2021-12-06 18:43:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:43:34,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:34,389 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:43:34,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 18:43:34,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:34,590 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -737545652, now seen corresponding path program 12 times [2021-12-06 18:43:34,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:34,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75412351] [2021-12-06 18:43:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:34,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:34,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:34,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75412351] [2021-12-06 18:43:34,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75412351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:34,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621462670] [2021-12-06 18:43:34,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:43:34,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:34,819 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:34,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 18:43:34,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 18:43:34,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:34,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 18:43:34,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:35,126 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 18:43:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:35,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:35,440 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 18:43:35,441 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 18:43:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:35,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621462670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:35,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:35,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 45 [2021-12-06 18:43:35,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266166317] [2021-12-06 18:43:35,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:35,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:43:35,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:43:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1842, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:43:35,547 INFO L87 Difference]: Start difference. First operand 1709 states and 1900 transitions. Second operand has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 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 18:43:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:36,690 INFO L93 Difference]: Finished difference Result 2678 states and 2942 transitions. [2021-12-06 18:43:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 18:43:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 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 96 [2021-12-06 18:43:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:36,693 INFO L225 Difference]: With dead ends: 2678 [2021-12-06 18:43:36,693 INFO L226 Difference]: Without dead ends: 2609 [2021-12-06 18:43:36,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=3997, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:43:36,694 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1057 mSDsluCounter, 3572 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 3737 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:36,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 3737 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2894 Invalid, 0 Unknown, 234 Unchecked, 0.7s Time] [2021-12-06 18:43:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-12-06 18:43:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1725. [2021-12-06 18:43:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1723 states have (on average 1.113755078351712) internal successors, (1919), 1724 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 1919 transitions. [2021-12-06 18:43:36,708 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 1919 transitions. Word has length 96 [2021-12-06 18:43:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:36,708 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 1919 transitions. [2021-12-06 18:43:36,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 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 18:43:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 1919 transitions. [2021-12-06 18:43:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:43:36,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:36,710 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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 18:43:36,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 18:43:36,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 18:43:36,911 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1278601445, now seen corresponding path program 9 times [2021-12-06 18:43:36,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:36,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005732921] [2021-12-06 18:43:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:36,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:37,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005732921] [2021-12-06 18:43:37,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005732921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661122988] [2021-12-06 18:43:37,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:43:37,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:37,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:37,106 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:37,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:43:37,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 18:43:37,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 18:43:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:37,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:37,793 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 18:43:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:37,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661122988] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:37,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:37,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2021-12-06 18:43:37,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433878002] [2021-12-06 18:43:37,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:37,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:43:37,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:43:37,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1735, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:43:37,840 INFO L87 Difference]: Start difference. First operand 1725 states and 1919 transitions. Second operand has 45 states, 44 states have (on average 5.340909090909091) internal successors, (235), 45 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:38,913 INFO L93 Difference]: Finished difference Result 2435 states and 2652 transitions. [2021-12-06 18:43:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:43:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.340909090909091) internal successors, (235), 45 states have internal predecessors, (235), 0 states have call successors, (0), 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 18:43:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:38,916 INFO L225 Difference]: With dead ends: 2435 [2021-12-06 18:43:38,916 INFO L226 Difference]: Without dead ends: 2435 [2021-12-06 18:43:38,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=3379, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 18:43:38,916 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 696 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:38,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1240 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:43:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-12-06 18:43:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1749. [2021-12-06 18:43:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1747 states have (on average 1.1110475100171724) internal successors, (1941), 1748 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 1941 transitions. [2021-12-06 18:43:38,934 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 1941 transitions. Word has length 97 [2021-12-06 18:43:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:38,934 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 1941 transitions. [2021-12-06 18:43:38,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.340909090909091) internal successors, (235), 45 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 1941 transitions. [2021-12-06 18:43:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:43:38,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:38,936 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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 18:43:38,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 18:43:39,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:39,137 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:39,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1725290594, now seen corresponding path program 8 times [2021-12-06 18:43:39,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:39,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946258267] [2021-12-06 18:43:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:39,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:39,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:39,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946258267] [2021-12-06 18:43:39,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946258267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:39,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925506722] [2021-12-06 18:43:39,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:43:39,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:39,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:39,469 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:39,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 18:43:39,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:43:39,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 18:43:39,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:39,568 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 10 treesize of output 8 [2021-12-06 18:43:39,816 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 18:43:39,860 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 18:43:41,169 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-06 18:43:41,169 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 48 treesize of output 20 [2021-12-06 18:43:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:41,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:41,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1403 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1403) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3))) (.cse0 (select v_ArrVal_1403 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse0 .cse1)) (= .cse1 0) (not (= .cse0 (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)))))))) is different from false [2021-12-06 18:43:41,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:41,705 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 76 treesize of output 54 [2021-12-06 18:43:41,714 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 18:43:41,714 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 101 treesize of output 92 [2021-12-06 18:43:41,726 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-06 18:43:41,726 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 64 treesize of output 64 [2021-12-06 18:43:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 22 proven. 141 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:42,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925506722] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:42,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:42,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 66 [2021-12-06 18:43:42,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515709188] [2021-12-06 18:43:42,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:42,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 18:43:42,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 18:43:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3919, Unknown=1, NotChecked=126, Total=4290 [2021-12-06 18:43:42,104 INFO L87 Difference]: Start difference. First operand 1749 states and 1941 transitions. Second operand has 66 states, 66 states have (on average 4.03030303030303) internal successors, (266), 66 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:42,798 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) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (forall ((v_ArrVal_1403 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1403) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse2 (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3))) (.cse1 (select v_ArrVal_1403 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse1 .cse2)) (= .cse2 0) (not (= .cse1 (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)))))))) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse4 (select .cse5 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3))) (.cse6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse4 0) (not (= (select .cse5 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) .cse6)) (not (= .cse4 .cse6))))) (or (and .cse0 (= |c_ULTIMATE.start_main_~length1~0#1| 4)) (and .cse0 (= |c_ULTIMATE.start_main_~length1~0#1| 5))))) is different from false [2021-12-06 18:43:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:43,316 INFO L93 Difference]: Finished difference Result 3182 states and 3499 transitions. [2021-12-06 18:43:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:43:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.03030303030303) internal successors, (266), 66 states have internal predecessors, (266), 0 states have call successors, (0), 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 18:43:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:43,319 INFO L225 Difference]: With dead ends: 3182 [2021-12-06 18:43:43,319 INFO L226 Difference]: Without dead ends: 3093 [2021-12-06 18:43:43,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=487, Invalid=7891, Unknown=2, NotChecked=362, Total=8742 [2021-12-06 18:43:43,320 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 171 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:43,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1961 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 910 Invalid, 0 Unknown, 412 Unchecked, 0.3s Time] [2021-12-06 18:43:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-12-06 18:43:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2932. [2021-12-06 18:43:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2930 states have (on average 1.1098976109215017) internal successors, (3252), 2931 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 3252 transitions. [2021-12-06 18:43:43,341 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 3252 transitions. Word has length 97 [2021-12-06 18:43:43,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:43,341 INFO L470 AbstractCegarLoop]: Abstraction has 2932 states and 3252 transitions. [2021-12-06 18:43:43,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.03030303030303) internal successors, (266), 66 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 3252 transitions. [2021-12-06 18:43:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 18:43:43,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:43,344 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:43:43,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:43,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:43,545 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 833771049, now seen corresponding path program 13 times [2021-12-06 18:43:43,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:43,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647405416] [2021-12-06 18:43:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:43,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:43,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:43,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647405416] [2021-12-06 18:43:43,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647405416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:43,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064522223] [2021-12-06 18:43:43,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:43:43,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:43,811 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:43,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 18:43:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:43:43,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:44,509 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 18:43:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:44,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064522223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:44,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:44,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 46 [2021-12-06 18:43:44,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874525391] [2021-12-06 18:43:44,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:44,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 18:43:44,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 18:43:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 18:43:44,558 INFO L87 Difference]: Start difference. First operand 2932 states and 3252 transitions. Second operand has 47 states, 46 states have (on average 4.521739130434782) internal successors, (208), 47 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:45,996 INFO L93 Difference]: Finished difference Result 4666 states and 5124 transitions. [2021-12-06 18:43:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:43:45,996 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.521739130434782) internal successors, (208), 47 states have internal predecessors, (208), 0 states have call successors, (0), 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 100 [2021-12-06 18:43:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:46,000 INFO L225 Difference]: With dead ends: 4666 [2021-12-06 18:43:46,000 INFO L226 Difference]: Without dead ends: 4666 [2021-12-06 18:43:46,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=994, Invalid=4262, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 18:43:46,001 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 954 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:46,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 1946 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3062 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:43:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-12-06 18:43:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3038. [2021-12-06 18:43:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3036 states have (on average 1.1119894598155469) internal successors, (3376), 3037 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 3376 transitions. [2021-12-06 18:43:46,025 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 3376 transitions. Word has length 100 [2021-12-06 18:43:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:46,025 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 3376 transitions. [2021-12-06 18:43:46,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.521739130434782) internal successors, (208), 47 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 3376 transitions. [2021-12-06 18:43:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 18:43:46,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:46,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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 18:43:46,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 18:43:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 18:43:46,232 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash -824280031, now seen corresponding path program 9 times [2021-12-06 18:43:46,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:46,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132008383] [2021-12-06 18:43:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:46,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:46,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:46,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132008383] [2021-12-06 18:43:46,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132008383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:46,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569484761] [2021-12-06 18:43:46,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:43:46,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:46,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:46,391 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:46,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 18:43:46,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:43:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:46,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:43:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:46,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:47,041 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 18:43:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:47,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569484761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:47,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:47,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2021-12-06 18:43:47,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108084728] [2021-12-06 18:43:47,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:47,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 18:43:47,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:47,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 18:43:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:43:47,081 INFO L87 Difference]: Start difference. First operand 3038 states and 3376 transitions. Second operand has 37 states, 36 states have (on average 7.416666666666667) internal successors, (267), 37 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:47,507 INFO L93 Difference]: Finished difference Result 4391 states and 4867 transitions. [2021-12-06 18:43:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:43:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 7.416666666666667) internal successors, (267), 37 states have internal predecessors, (267), 0 states have call successors, (0), 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 18:43:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:47,511 INFO L225 Difference]: With dead ends: 4391 [2021-12-06 18:43:47,511 INFO L226 Difference]: Without dead ends: 4391 [2021-12-06 18:43:47,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:43:47,512 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 688 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:47,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 965 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:43:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-12-06 18:43:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3287. [2021-12-06 18:43:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 3285 states have (on average 1.1120243531202436) internal successors, (3653), 3286 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 3653 transitions. [2021-12-06 18:43:47,539 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 3653 transitions. Word has length 101 [2021-12-06 18:43:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:47,539 INFO L470 AbstractCegarLoop]: Abstraction has 3287 states and 3653 transitions. [2021-12-06 18:43:47,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 7.416666666666667) internal successors, (267), 37 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 3653 transitions. [2021-12-06 18:43:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 18:43:47,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:47,542 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 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 18:43:47,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 18:43:47,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:47,743 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1416936263, now seen corresponding path program 10 times [2021-12-06 18:43:47,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:47,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776680769] [2021-12-06 18:43:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:47,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 29 proven. 215 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:47,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776680769] [2021-12-06 18:43:47,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776680769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307516512] [2021-12-06 18:43:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:43:47,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:47,937 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:47,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 18:43:48,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:43:48,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 18:43:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:48,044 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:48,045 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 18:43:48,314 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 18:43:48,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:48,853 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 18:43:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 125 proven. 119 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:48,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:49,371 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 18:43:49,373 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 18:43:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 114 proven. 130 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:49,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307516512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:49,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:49,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 61 [2021-12-06 18:43:49,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759693481] [2021-12-06 18:43:49,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:49,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 18:43:49,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 18:43:49,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3335, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 18:43:49,908 INFO L87 Difference]: Start difference. First operand 3287 states and 3653 transitions. Second operand has 61 states, 61 states have (on average 4.491803278688525) internal successors, (274), 61 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:50,883 INFO L93 Difference]: Finished difference Result 4927 states and 5431 transitions. [2021-12-06 18:43:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:43:50,884 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.491803278688525) internal successors, (274), 61 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 18:43:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:50,888 INFO L225 Difference]: With dead ends: 4927 [2021-12-06 18:43:50,888 INFO L226 Difference]: Without dead ends: 4842 [2021-12-06 18:43:50,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=879, Invalid=7863, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:43:50,889 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 160 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:50,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1986 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 968 Invalid, 0 Unknown, 688 Unchecked, 0.2s Time] [2021-12-06 18:43:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2021-12-06 18:43:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 3703. [2021-12-06 18:43:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3701 states have (on average 1.1113212645231019) internal successors, (4113), 3702 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 4113 transitions. [2021-12-06 18:43:50,922 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 4113 transitions. Word has length 103 [2021-12-06 18:43:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:50,922 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 4113 transitions. [2021-12-06 18:43:50,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.491803278688525) internal successors, (274), 61 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 4113 transitions. [2021-12-06 18:43:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 18:43:50,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:50,925 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:43:50,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 18:43:51,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:51,126 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1737904387, now seen corresponding path program 14 times [2021-12-06 18:43:51,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:51,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626346961] [2021-12-06 18:43:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:51,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:51,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:51,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626346961] [2021-12-06 18:43:51,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626346961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:51,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925648967] [2021-12-06 18:43:51,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:43:51,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:51,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:51,388 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:51,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 18:43:51,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:43:51,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:51,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 18:43:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:51,607 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 18:43:52,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:52,703 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 18 [2021-12-06 18:43:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:52,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:53,769 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 18:43:53,771 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 15 treesize of output 11 [2021-12-06 18:43:53,774 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 18:43:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:53,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925648967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:53,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:53,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 68 [2021-12-06 18:43:53,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733117682] [2021-12-06 18:43:53,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:53,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 18:43:53,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 18:43:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=4230, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:43:53,825 INFO L87 Difference]: Start difference. First operand 3703 states and 4113 transitions. Second operand has 68 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 68 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 18:43:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:55,165 INFO L93 Difference]: Finished difference Result 5281 states and 5843 transitions. [2021-12-06 18:43:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 18:43:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 68 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 106 [2021-12-06 18:43:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:55,170 INFO L225 Difference]: With dead ends: 5281 [2021-12-06 18:43:55,170 INFO L226 Difference]: Without dead ends: 5211 [2021-12-06 18:43:55,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=565, Invalid=6917, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 18:43:55,171 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 713 mSDsluCounter, 4471 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 4649 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 951 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:55,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 4649 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1956 Invalid, 0 Unknown, 951 Unchecked, 0.5s Time] [2021-12-06 18:43:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2021-12-06 18:43:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 3981. [2021-12-06 18:43:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3979 states have (on average 1.1125911032922844) internal successors, (4427), 3980 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4427 transitions. [2021-12-06 18:43:55,208 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4427 transitions. Word has length 106 [2021-12-06 18:43:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:55,208 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 4427 transitions. [2021-12-06 18:43:55,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 68 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 18:43:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4427 transitions. [2021-12-06 18:43:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 18:43:55,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:55,211 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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 18:43:55,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:55,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 18:43:55,412 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -598942148, now seen corresponding path program 11 times [2021-12-06 18:43:55,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256732716] [2021-12-06 18:43:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:55,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 45 proven. 224 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:55,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:55,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256732716] [2021-12-06 18:43:55,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256732716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:55,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503518263] [2021-12-06 18:43:55,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:43:55,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:55,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:55,650 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:55,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 18:43:55,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 18:43:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 18:43:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:55,804 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:55,804 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 18:43:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 66 proven. 203 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:56,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 91 proven. 178 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:43:56,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503518263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:56,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:56,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 53 [2021-12-06 18:43:56,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297685755] [2021-12-06 18:43:56,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:56,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 18:43:56,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 18:43:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2477, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:43:56,756 INFO L87 Difference]: Start difference. First operand 3981 states and 4427 transitions. Second operand has 54 states, 53 states have (on average 5.2075471698113205) internal successors, (276), 54 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:57,744 INFO L93 Difference]: Finished difference Result 5889 states and 6454 transitions. [2021-12-06 18:43:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:43:57,744 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 5.2075471698113205) internal successors, (276), 54 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-06 18:43:57,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:57,748 INFO L225 Difference]: With dead ends: 5889 [2021-12-06 18:43:57,749 INFO L226 Difference]: Without dead ends: 5632 [2021-12-06 18:43:57,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1172, Invalid=4528, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:43:57,749 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 704 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:57,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1480 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:43:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-12-06 18:43:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 4455. [2021-12-06 18:43:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 4453 states have (on average 1.112957556703346) internal successors, (4956), 4454 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 4956 transitions. [2021-12-06 18:43:57,790 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 4956 transitions. Word has length 107 [2021-12-06 18:43:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:57,790 INFO L470 AbstractCegarLoop]: Abstraction has 4455 states and 4956 transitions. [2021-12-06 18:43:57,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 5.2075471698113205) internal successors, (276), 54 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 4956 transitions. [2021-12-06 18:43:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 18:43:57,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:57,794 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:57,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 18:43:57,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 18:43:57,995 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:43:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:57,995 INFO L85 PathProgramCache]: Analyzing trace with hash -209651763, now seen corresponding path program 3 times [2021-12-06 18:43:57,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:57,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902484364] [2021-12-06 18:43:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:57,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:43:58,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902484364] [2021-12-06 18:43:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902484364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081871500] [2021-12-06 18:43:58,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:43:58,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:58,188 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:58,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 18:43:58,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:43:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 18:43:58,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:58,338 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 10 treesize of output 8 [2021-12-06 18:43:58,481 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 18:43:58,507 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 18:43:58,833 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:43:58,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 18:43:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 178 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:43:58,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:59,109 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1711 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1711) |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 18:43:59,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:59,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:43:59,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:59,116 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 18:43:59,118 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 18:43:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 183 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:43:59,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081871500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:59,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:59,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 43 [2021-12-06 18:43:59,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634919232] [2021-12-06 18:43:59,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:59,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 18:43:59,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 18:43:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1593, Unknown=1, NotChecked=80, Total=1806 [2021-12-06 18:43:59,291 INFO L87 Difference]: Start difference. First operand 4455 states and 4956 transitions. Second operand has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:59,771 INFO L93 Difference]: Finished difference Result 4817 states and 5340 transitions. [2021-12-06 18:43:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:43:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 states have internal predecessors, (193), 0 states have call successors, (0), 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 107 [2021-12-06 18:43:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:59,774 INFO L225 Difference]: With dead ends: 4817 [2021-12-06 18:43:59,774 INFO L226 Difference]: Without dead ends: 3662 [2021-12-06 18:43:59,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=2262, Unknown=1, NotChecked=96, Total=2550 [2021-12-06 18:43:59,774 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 122 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:59,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1523 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1040 Invalid, 0 Unknown, 426 Unchecked, 0.3s Time] [2021-12-06 18:43:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2021-12-06 18:43:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3044. [2021-12-06 18:43:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3042 states have (on average 1.1153846153846154) internal successors, (3393), 3043 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 3393 transitions. [2021-12-06 18:43:59,797 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 3393 transitions. Word has length 107 [2021-12-06 18:43:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:59,797 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 3393 transitions. [2021-12-06 18:43:59,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 3393 transitions. [2021-12-06 18:43:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 18:43:59,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:59,799 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 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 18:43:59,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-06 18:44:00,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:00,000 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:44:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1449397339, now seen corresponding path program 12 times [2021-12-06 18:44:00,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:00,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803451925] [2021-12-06 18:44:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:00,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:44:00,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:00,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803451925] [2021-12-06 18:44:00,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803451925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:00,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736826319] [2021-12-06 18:44:00,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:44:00,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:00,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:00,215 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:00,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 18:44:00,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:44:00,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 18:44:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:00,514 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 18:44:00,768 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 18:44:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:44:00,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:00,884 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 18:44:00,885 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 18:44:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:44:00,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736826319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:00,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:00,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 40 [2021-12-06 18:44:00,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832367209] [2021-12-06 18:44:00,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 18:44:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 18:44:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:44:00,980 INFO L87 Difference]: Start difference. First operand 3044 states and 3393 transitions. Second operand has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 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 18:44:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:01,887 INFO L93 Difference]: Finished difference Result 3404 states and 3747 transitions. [2021-12-06 18:44:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:44:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 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 109 [2021-12-06 18:44:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:01,889 INFO L225 Difference]: With dead ends: 3404 [2021-12-06 18:44:01,889 INFO L226 Difference]: Without dead ends: 3042 [2021-12-06 18:44:01,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=3156, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:44:01,890 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 477 mSDsluCounter, 2692 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:01,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 2833 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2220 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2021-12-06 18:44:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-12-06 18:44:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2512. [2021-12-06 18:44:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2510 states have (on average 1.1131474103585657) internal successors, (2794), 2511 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 2794 transitions. [2021-12-06 18:44:01,911 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 2794 transitions. Word has length 109 [2021-12-06 18:44:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:01,912 INFO L470 AbstractCegarLoop]: Abstraction has 2512 states and 2794 transitions. [2021-12-06 18:44:01,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 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 18:44:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 2794 transitions. [2021-12-06 18:44:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 18:44:01,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:01,914 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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 18:44:01,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 18:44:02,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 18:44:02,114 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:44:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1378974092, now seen corresponding path program 10 times [2021-12-06 18:44:02,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242324506] [2021-12-06 18:44:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:02,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:02,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:02,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242324506] [2021-12-06 18:44:02,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242324506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:02,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727805402] [2021-12-06 18:44:02,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:44:02,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:02,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:02,462 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:02,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 18:44:02,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:44:02,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 18:44:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:02,577 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:44:02,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:44:02,586 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 18:44:02,940 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 18:44:02,988 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 18:44:14,261 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 18:44:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:15,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 17 [2021-12-06 18:44:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 120 proven. 124 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:15,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:16,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:44:16,757 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 70 treesize of output 48 [2021-12-06 18:44:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:16,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:44:16,769 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 89 treesize of output 92 [2021-12-06 18:44:16,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:16,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:44:16,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2021-12-06 18:44:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 129 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:18,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727805402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:18,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:18,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 73 [2021-12-06 18:44:18,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148602274] [2021-12-06 18:44:18,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:18,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 18:44:18,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 18:44:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=4884, Unknown=3, NotChecked=0, Total=5256 [2021-12-06 18:44:18,270 INFO L87 Difference]: Start difference. First operand 2512 states and 2794 transitions. Second operand has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:40,168 INFO L93 Difference]: Finished difference Result 5254 states and 5824 transitions. [2021-12-06 18:44:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 18:44:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 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 18:44:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:40,171 INFO L225 Difference]: With dead ends: 5254 [2021-12-06 18:44:40,171 INFO L226 Difference]: Without dead ends: 5149 [2021-12-06 18:44:40,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3941 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=1423, Invalid=16927, Unknown=10, NotChecked=0, Total=18360 [2021-12-06 18:44:40,172 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 322 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:40,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 2073 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 880 Invalid, 0 Unknown, 394 Unchecked, 0.3s Time] [2021-12-06 18:44:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2021-12-06 18:44:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 5069. [2021-12-06 18:44:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5067 states have (on average 1.1111111111111112) internal successors, (5630), 5068 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 5630 transitions. [2021-12-06 18:44:40,213 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 5630 transitions. Word has length 114 [2021-12-06 18:44:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:40,213 INFO L470 AbstractCegarLoop]: Abstraction has 5069 states and 5630 transitions. [2021-12-06 18:44:40,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 5630 transitions. [2021-12-06 18:44:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:44:40,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:40,216 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:44:40,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-06 18:44:40,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 18:44:40,417 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:44:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:40,418 INFO L85 PathProgramCache]: Analyzing trace with hash 772743854, now seen corresponding path program 15 times [2021-12-06 18:44:40,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:40,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338133668] [2021-12-06 18:44:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:40,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:40,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:40,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338133668] [2021-12-06 18:44:40,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338133668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:40,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676747790] [2021-12-06 18:44:40,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:44:40,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:40,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:40,781 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:40,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 18:44:41,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 18:44:41,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:41,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 18:44:41,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:41,283 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 18:44:41,538 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 18:44:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:41,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:41,700 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 18:44:41,701 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 18:44:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:41,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676747790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:41,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:41,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 49 [2021-12-06 18:44:41,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921525106] [2021-12-06 18:44:41,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:41,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:44:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:44:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2206, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:44:41,848 INFO L87 Difference]: Start difference. First operand 5069 states and 5630 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 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 18:44:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:43,662 INFO L93 Difference]: Finished difference Result 9184 states and 10190 transitions. [2021-12-06 18:44:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:44:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 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 116 [2021-12-06 18:44:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:43,671 INFO L225 Difference]: With dead ends: 9184 [2021-12-06 18:44:43,671 INFO L226 Difference]: Without dead ends: 9087 [2021-12-06 18:44:43,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=467, Invalid=4935, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 18:44:43,672 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 808 mSDsluCounter, 5747 mSDsCounter, 0 mSdLazyCounter, 4012 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 5969 SdHoareTripleChecker+Invalid, 4433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:43,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 5969 Invalid, 4433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4012 Invalid, 0 Unknown, 378 Unchecked, 1.2s Time] [2021-12-06 18:44:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9087 states. [2021-12-06 18:44:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9087 to 5895. [2021-12-06 18:44:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5895 states, 5893 states have (on average 1.1140335991854744) internal successors, (6565), 5894 states have internal predecessors, (6565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5895 states to 5895 states and 6565 transitions. [2021-12-06 18:44:43,728 INFO L78 Accepts]: Start accepts. Automaton has 5895 states and 6565 transitions. Word has length 116 [2021-12-06 18:44:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:43,728 INFO L470 AbstractCegarLoop]: Abstraction has 5895 states and 6565 transitions. [2021-12-06 18:44:43,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 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 18:44:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5895 states and 6565 transitions. [2021-12-06 18:44:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:44:43,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:43,732 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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 18:44:43,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-06 18:44:43,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:43,934 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:44:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash 802577257, now seen corresponding path program 11 times [2021-12-06 18:44:43,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:43,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217497374] [2021-12-06 18:44:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:43,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:44,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:44,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217497374] [2021-12-06 18:44:44,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217497374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:44,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213789181] [2021-12-06 18:44:44,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:44:44,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:44,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:44,135 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:44,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 18:44:44,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 18:44:44,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:44:44,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:44,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:44,917 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 18:44:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:45,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213789181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:45,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:45,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-12-06 18:44:45,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301757222] [2021-12-06 18:44:45,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:45,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:44:45,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:44:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:44:45,121 INFO L87 Difference]: Start difference. First operand 5895 states and 6565 transitions. Second operand has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:45,721 INFO L93 Difference]: Finished difference Result 7148 states and 7929 transitions. [2021-12-06 18:44:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:44:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-06 18:44:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:45,725 INFO L225 Difference]: With dead ends: 7148 [2021-12-06 18:44:45,725 INFO L226 Difference]: Without dead ends: 7148 [2021-12-06 18:44:45,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:44:45,726 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 752 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:45,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1299 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:44:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7148 states. [2021-12-06 18:44:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7148 to 6248. [2021-12-06 18:44:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6246 states have (on average 1.1141530579570926) internal successors, (6959), 6247 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 6959 transitions. [2021-12-06 18:44:45,780 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 6959 transitions. Word has length 118 [2021-12-06 18:44:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:45,780 INFO L470 AbstractCegarLoop]: Abstraction has 6248 states and 6959 transitions. [2021-12-06 18:44:45,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 6959 transitions. [2021-12-06 18:44:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:44:45,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:45,784 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:44:45,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 18:44:45,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:45,985 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:44:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash 783545867, now seen corresponding path program 16 times [2021-12-06 18:44:45,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:45,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383371032] [2021-12-06 18:44:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:45,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:46,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383371032] [2021-12-06 18:44:46,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383371032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087623489] [2021-12-06 18:44:46,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:44:46,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:46,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:46,322 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:46,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 18:44:46,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:44:46,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:46,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:44:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:46,431 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:44:46,432 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 18:44:46,841 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 18:44:47,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:44:47,567 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 19 treesize of output 19 [2021-12-06 18:44:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 162 proven. 308 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:47,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:48,733 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 18:44:48,735 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 18:44:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 190 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:50,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087623489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:50,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:50,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 30] total 83 [2021-12-06 18:44:50,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91779184] [2021-12-06 18:44:50,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:50,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 18:44:50,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 18:44:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=6297, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 18:44:50,152 INFO L87 Difference]: Start difference. First operand 6248 states and 6959 transitions. Second operand has 84 states, 83 states have (on average 4.240963855421687) internal successors, (352), 84 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:56,303 INFO L93 Difference]: Finished difference Result 11730 states and 12949 transitions. [2021-12-06 18:44:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 18:44:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.240963855421687) internal successors, (352), 84 states have internal predecessors, (352), 0 states have call successors, (0), 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 18:44:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:56,309 INFO L225 Difference]: With dead ends: 11730 [2021-12-06 18:44:56,309 INFO L226 Difference]: Without dead ends: 11668 [2021-12-06 18:44:56,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5204, Invalid=19602, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 18:44:56,311 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 3080 mSDsluCounter, 3801 mSDsCounter, 0 mSdLazyCounter, 6073 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3080 SdHoareTripleChecker+Valid, 3949 SdHoareTripleChecker+Invalid, 6548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 6073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:56,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3080 Valid, 3949 Invalid, 6548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 6073 Invalid, 0 Unknown, 187 Unchecked, 2.3s Time] [2021-12-06 18:44:56,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11668 states. [2021-12-06 18:44:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11668 to 7518. [2021-12-06 18:44:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7518 states, 7516 states have (on average 1.1204097924427887) internal successors, (8421), 7517 states have internal predecessors, (8421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7518 states to 7518 states and 8421 transitions. [2021-12-06 18:44:56,394 INFO L78 Accepts]: Start accepts. Automaton has 7518 states and 8421 transitions. Word has length 120 [2021-12-06 18:44:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:56,394 INFO L470 AbstractCegarLoop]: Abstraction has 7518 states and 8421 transitions. [2021-12-06 18:44:56,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.240963855421687) internal successors, (352), 84 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7518 states and 8421 transitions. [2021-12-06 18:44:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 18:44:56,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:56,399 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 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 18:44:56,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-06 18:44:56,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-06 18:44:56,600 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:44:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:56,601 INFO L85 PathProgramCache]: Analyzing trace with hash 185356263, now seen corresponding path program 13 times [2021-12-06 18:44:56,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:56,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520403230] [2021-12-06 18:44:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:56,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 37 proven. 365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:44:56,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:56,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520403230] [2021-12-06 18:44:56,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520403230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:56,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410943381] [2021-12-06 18:44:56,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:44:56,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:56,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:56,896 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:56,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 18:44:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 18:44:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:57,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:44:57,438 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 18:44:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 37 proven. 365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:44:57,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:57,570 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 18:44:57,573 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 18:44:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 37 proven. 365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:44:57,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410943381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:57,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:57,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 46 [2021-12-06 18:44:57,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965904503] [2021-12-06 18:44:57,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:57,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:44:57,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:44:57,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 18:44:57,693 INFO L87 Difference]: Start difference. First operand 7518 states and 8421 transitions. Second operand has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:59,235 INFO L93 Difference]: Finished difference Result 9357 states and 10380 transitions. [2021-12-06 18:44:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:44:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-12-06 18:44:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:59,240 INFO L225 Difference]: With dead ends: 9357 [2021-12-06 18:44:59,240 INFO L226 Difference]: Without dead ends: 9263 [2021-12-06 18:44:59,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=436, Invalid=4256, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:44:59,240 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 674 mSDsluCounter, 4666 mSDsCounter, 0 mSdLazyCounter, 3422 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 4863 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:59,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 4863 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3422 Invalid, 0 Unknown, 150 Unchecked, 1.0s Time] [2021-12-06 18:44:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9263 states. [2021-12-06 18:44:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9263 to 8078. [2021-12-06 18:44:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8078 states, 8076 states have (on average 1.120604259534423) internal successors, (9050), 8077 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 18:44:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8078 states to 8078 states and 9050 transitions. [2021-12-06 18:44:59,318 INFO L78 Accepts]: Start accepts. Automaton has 8078 states and 9050 transitions. Word has length 123 [2021-12-06 18:44:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:59,318 INFO L470 AbstractCegarLoop]: Abstraction has 8078 states and 9050 transitions. [2021-12-06 18:44:59,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 8078 states and 9050 transitions. [2021-12-06 18:44:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:44:59,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:59,323 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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 18:44:59,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 18:44:59,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:59,524 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:44:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1389650563, now seen corresponding path program 4 times [2021-12-06 18:44:59,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:59,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559006050] [2021-12-06 18:44:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:59,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:44:59,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559006050] [2021-12-06 18:44:59,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559006050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028807900] [2021-12-06 18:44:59,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:44:59,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:59,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:59,935 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:59,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 18:45:00,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:45:00,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 18:45:00,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:00,054 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:45:00,054 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 18:45:00,616 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 18:45:00,681 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:45:00,681 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 18:45:00,699 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 18:45:07,540 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:45:07,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 18:45:08,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:08,124 INFO L354 Elim1Store]: treesize reduction 17, result has 43.3 percent of original size [2021-12-06 18:45:08,124 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 32 treesize of output 26 [2021-12-06 18:45:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 170 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:45:08,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:10,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:45:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2021-12-06 18:45:10,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:45:10,151 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 103 treesize of output 112 [2021-12-06 18:45:10,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:45:10,160 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 64 treesize of output 62 [2021-12-06 18:45:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 161 proven. 121 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:45:11,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028807900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:11,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:11,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 79 [2021-12-06 18:45:11,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789938225] [2021-12-06 18:45:11,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:11,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 18:45:11,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:11,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 18:45:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=5789, Unknown=8, NotChecked=0, Total=6162 [2021-12-06 18:45:11,485 INFO L87 Difference]: Start difference. First operand 8078 states and 9050 transitions. Second operand has 79 states, 79 states have (on average 4.253164556962025) internal successors, (336), 79 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 18:46:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:03,749 INFO L93 Difference]: Finished difference Result 9153 states and 10218 transitions. [2021-12-06 18:46:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 18:46:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.253164556962025) internal successors, (336), 79 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 124 [2021-12-06 18:46:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:03,754 INFO L225 Difference]: With dead ends: 9153 [2021-12-06 18:46:03,754 INFO L226 Difference]: Without dead ends: 9139 [2021-12-06 18:46:03,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6170 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=1658, Invalid=24703, Unknown=45, NotChecked=0, Total=26406 [2021-12-06 18:46:03,755 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 541 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 860 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:03,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1615 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1450 Invalid, 0 Unknown, 860 Unchecked, 0.5s Time] [2021-12-06 18:46:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9139 states. [2021-12-06 18:46:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9139 to 8920. [2021-12-06 18:46:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8920 states, 8918 states have (on average 1.1188607311056291) internal successors, (9978), 8919 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8920 states to 8920 states and 9978 transitions. [2021-12-06 18:46:03,821 INFO L78 Accepts]: Start accepts. Automaton has 8920 states and 9978 transitions. Word has length 124 [2021-12-06 18:46:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:03,821 INFO L470 AbstractCegarLoop]: Abstraction has 8920 states and 9978 transitions. [2021-12-06 18:46:03,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.253164556962025) internal successors, (336), 79 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 18:46:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8920 states and 9978 transitions. [2021-12-06 18:46:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:46:03,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:03,825 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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 18:46:03,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 18:46:04,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-06 18:46:04,026 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:04,028 INFO L85 PathProgramCache]: Analyzing trace with hash -373154923, now seen corresponding path program 5 times [2021-12-06 18:46:04,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:04,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902267973] [2021-12-06 18:46:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:04,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:46:04,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:04,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902267973] [2021-12-06 18:46:04,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902267973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:04,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10974020] [2021-12-06 18:46:04,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:46:04,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:04,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:04,451 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:04,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 18:46:04,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 18:46:04,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 18:46:04,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:04,605 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:46:04,605 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 18:46:05,048 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 18:46:05,100 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:46:05,100 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 18:46:05,105 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 8 treesize of output 3 [2021-12-06 18:46:06,772 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 18:46:07,044 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:46:07,045 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 18:46:07,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:46:07,510 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 18:46:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:46:07,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:07,700 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 6 treesize of output 4 [2021-12-06 18:46:08,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:08,367 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 18:46:08,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:08,371 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 18:46:08,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:08,376 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 18:46:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 271 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:46:09,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10974020] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:09,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:09,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32, 31] total 81 [2021-12-06 18:46:09,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168043982] [2021-12-06 18:46:09,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:09,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:46:09,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:46:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=6210, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:46:09,511 INFO L87 Difference]: Start difference. First operand 8920 states and 9978 transitions. Second operand has 81 states, 81 states have (on average 4.135802469135802) internal successors, (335), 81 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:12,523 INFO L93 Difference]: Finished difference Result 9322 states and 10412 transitions. [2021-12-06 18:46:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 18:46:12,523 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.135802469135802) internal successors, (335), 81 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-06 18:46:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:12,528 INFO L225 Difference]: With dead ends: 9322 [2021-12-06 18:46:12,529 INFO L226 Difference]: Without dead ends: 9308 [2021-12-06 18:46:12,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=801, Invalid=15455, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 18:46:12,529 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 252 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:12,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1385 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1790 Invalid, 0 Unknown, 1253 Unchecked, 0.6s Time] [2021-12-06 18:46:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9308 states. [2021-12-06 18:46:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9308 to 9283. [2021-12-06 18:46:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9281 states have (on average 1.1177674819523757) internal successors, (10374), 9282 states have internal predecessors, (10374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 10374 transitions. [2021-12-06 18:46:12,601 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 10374 transitions. Word has length 124 [2021-12-06 18:46:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:12,601 INFO L470 AbstractCegarLoop]: Abstraction has 9283 states and 10374 transitions. [2021-12-06 18:46:12,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.135802469135802) internal successors, (335), 81 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 10374 transitions. [2021-12-06 18:46:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:46:12,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:12,605 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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 18:46:12,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 18:46:12,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 18:46:12,806 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1494006659, now seen corresponding path program 6 times [2021-12-06 18:46:12,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:12,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481268125] [2021-12-06 18:46:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:12,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:46:13,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481268125] [2021-12-06 18:46:13,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481268125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980274957] [2021-12-06 18:46:13,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:46:13,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:13,237 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:13,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 18:46:13,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:46:13,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:13,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 18:46:13,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:13,427 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 18:46:13,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:13,786 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 18:46:15,595 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-06 18:46:15,595 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 18:46:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:46:15,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:16,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2197 (Array Int Int))) (let ((.cse0 (select v_ArrVal_2197 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2197) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= .cse0 0) (not (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse0)) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5))))))) is different from false [2021-12-06 18:46:16,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:16,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:16,475 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 18:46:16,475 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 18:46:16,490 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-06 18:46:16,491 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 18:46:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 35 proven. 241 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:46:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980274957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:17,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:17,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 31] total 78 [2021-12-06 18:46:17,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074069035] [2021-12-06 18:46:17,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:17,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 18:46:17,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 18:46:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=5549, Unknown=1, NotChecked=150, Total=6006 [2021-12-06 18:46:17,088 INFO L87 Difference]: Start difference. First operand 9283 states and 10374 transitions. Second operand has 78 states, 78 states have (on average 4.038461538461538) internal successors, (315), 78 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:18,722 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)))) (and (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) .cse0)) (not (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse0)))) .cse2 (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_2197 (Array Int Int))) (let ((.cse3 (select v_ArrVal_2197 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2197) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= .cse3 0) (not (= (select .cse4 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse3)) (not (= .cse3 (select .cse4 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5))))))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (or (and .cse2 (= |c_ULTIMATE.start_main_~length1~0#1| 6)) (and .cse2 (= |c_ULTIMATE.start_main_~length1~0#1| 4))))) is different from false [2021-12-06 18:46:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:20,040 INFO L93 Difference]: Finished difference Result 12483 states and 13903 transitions. [2021-12-06 18:46:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 18:46:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.038461538461538) internal successors, (315), 78 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-06 18:46:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:20,049 INFO L225 Difference]: With dead ends: 12483 [2021-12-06 18:46:20,049 INFO L226 Difference]: Without dead ends: 12437 [2021-12-06 18:46:20,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 202 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=811, Invalid=12535, Unknown=2, NotChecked=458, Total=13806 [2021-12-06 18:46:20,050 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 733 mSDsluCounter, 4172 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 4284 SdHoareTripleChecker+Invalid, 4240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1648 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:20,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 4284 Invalid, 4240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2532 Invalid, 0 Unknown, 1648 Unchecked, 0.9s Time] [2021-12-06 18:46:20,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12437 states. [2021-12-06 18:46:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12437 to 10629. [2021-12-06 18:46:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10627 states have (on average 1.1217653147642797) internal successors, (11921), 10628 states have internal predecessors, (11921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 11921 transitions. [2021-12-06 18:46:20,159 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 11921 transitions. Word has length 124 [2021-12-06 18:46:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:20,159 INFO L470 AbstractCegarLoop]: Abstraction has 10629 states and 11921 transitions. [2021-12-06 18:46:20,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.038461538461538) internal successors, (315), 78 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 11921 transitions. [2021-12-06 18:46:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 18:46:20,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:20,163 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 8, 8, 8, 8, 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 18:46:20,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:20,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 18:46:20,364 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash -589496237, now seen corresponding path program 14 times [2021-12-06 18:46:20,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:20,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870265917] [2021-12-06 18:46:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:20,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 41 proven. 416 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:46:20,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870265917] [2021-12-06 18:46:20,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870265917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:20,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575881863] [2021-12-06 18:46:20,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:46:20,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:20,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:20,657 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:20,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 18:46:20,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:46:20,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:20,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 18:46:20,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:20,906 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 18:46:22,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:22,373 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 18 [2021-12-06 18:46:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 91 proven. 366 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:46:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:23,566 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 13 [2021-12-06 18:46:23,569 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 18:46:23,573 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 18:46:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 91 proven. 366 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:46:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575881863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:23,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:23,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 68 [2021-12-06 18:46:23,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931400647] [2021-12-06 18:46:23,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:23,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 18:46:23,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 18:46:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=4230, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:46:23,622 INFO L87 Difference]: Start difference. First operand 10629 states and 11921 transitions. Second operand has 68 states, 68 states have (on average 4.529411764705882) internal successors, (308), 68 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:26,795 INFO L93 Difference]: Finished difference Result 11687 states and 12983 transitions. [2021-12-06 18:46:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:46:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.529411764705882) internal successors, (308), 68 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-06 18:46:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:26,800 INFO L225 Difference]: With dead ends: 11687 [2021-12-06 18:46:26,801 INFO L226 Difference]: Without dead ends: 11274 [2021-12-06 18:46:26,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 261 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=846, Invalid=10496, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 18:46:26,801 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 620 mSDsluCounter, 3717 mSDsCounter, 0 mSdLazyCounter, 3571 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 3865 SdHoareTripleChecker+Invalid, 4173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:26,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 3865 Invalid, 4173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3571 Invalid, 0 Unknown, 562 Unchecked, 1.2s Time] [2021-12-06 18:46:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-12-06 18:46:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 9839. [2021-12-06 18:46:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9839 states, 9837 states have (on average 1.1173121886754092) internal successors, (10991), 9838 states have internal predecessors, (10991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9839 states to 9839 states and 10991 transitions. [2021-12-06 18:46:26,881 INFO L78 Accepts]: Start accepts. Automaton has 9839 states and 10991 transitions. Word has length 129 [2021-12-06 18:46:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:26,881 INFO L470 AbstractCegarLoop]: Abstraction has 9839 states and 10991 transitions. [2021-12-06 18:46:26,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.529411764705882) internal successors, (308), 68 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9839 states and 10991 transitions. [2021-12-06 18:46:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 18:46:26,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:26,885 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:26,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 18:46:27,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 18:46:27,088 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash -807702295, now seen corresponding path program 7 times [2021-12-06 18:46:27,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902165406] [2021-12-06 18:46:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:27,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 12 proven. 305 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:46:27,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902165406] [2021-12-06 18:46:27,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902165406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838338058] [2021-12-06 18:46:27,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:46:27,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:27,387 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:27,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 18:46:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 18:46:27,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:27,503 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 10 treesize of output 8 [2021-12-06 18:46:27,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:27,774 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 18:46:27,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:46:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 103 proven. 209 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:46:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:28,156 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2308 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2308) |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 18:46:28,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:28,164 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 18:46:28,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:28,168 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 18:46:28,170 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 18:46:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 103 proven. 209 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:46:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838338058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:28,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:28,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 40 [2021-12-06 18:46:28,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886108294] [2021-12-06 18:46:28,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:28,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 18:46:28,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 18:46:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1373, Unknown=1, NotChecked=74, Total=1560 [2021-12-06 18:46:28,358 INFO L87 Difference]: Start difference. First operand 9839 states and 10991 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:28,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:28,979 INFO L93 Difference]: Finished difference Result 8485 states and 9406 transitions. [2021-12-06 18:46:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:46:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 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 18:46:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:28,982 INFO L225 Difference]: With dead ends: 8485 [2021-12-06 18:46:28,982 INFO L226 Difference]: Without dead ends: 5025 [2021-12-06 18:46:28,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 241 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=2083, Unknown=1, NotChecked=92, Total=2352 [2021-12-06 18:46:28,982 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 114 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:28,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1783 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1458 Invalid, 0 Unknown, 213 Unchecked, 0.4s Time] [2021-12-06 18:46:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2021-12-06 18:46:29,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 3962. [2021-12-06 18:46:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3962 states, 3960 states have (on average 1.1184343434343433) internal successors, (4429), 3961 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 4429 transitions. [2021-12-06 18:46:29,011 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 4429 transitions. Word has length 130 [2021-12-06 18:46:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:29,011 INFO L470 AbstractCegarLoop]: Abstraction has 3962 states and 4429 transitions. [2021-12-06 18:46:29,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 4429 transitions. [2021-12-06 18:46:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 18:46:29,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:29,012 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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 18:46:29,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:29,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 18:46:29,213 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash 865906500, now seen corresponding path program 12 times [2021-12-06 18:46:29,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:29,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088362907] [2021-12-06 18:46:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:29,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:29,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:29,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088362907] [2021-12-06 18:46:29,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088362907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:29,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049274817] [2021-12-06 18:46:29,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:46:29,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:29,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:29,662 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:29,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 18:46:29,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:46:29,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:46:29,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:29,855 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 18:46:30,122 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 18:46:30,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:46:31,238 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 18:46:31,238 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 33 treesize of output 30 [2021-12-06 18:46:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:31,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:32,286 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2358 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2358))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (= .cse0 0) (not (= (select (select .cse1 |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 18:46:32,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:32,292 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 64 treesize of output 42 [2021-12-06 18:46:32,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:32,305 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 111 treesize of output 120 [2021-12-06 18:46:32,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:32,313 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 68 treesize of output 64 [2021-12-06 18:46:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:32,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049274817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:32,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:32,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 68 [2021-12-06 18:46:32,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536334439] [2021-12-06 18:46:32,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:32,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 18:46:32,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 18:46:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4226, Unknown=1, NotChecked=130, Total=4556 [2021-12-06 18:46:32,630 INFO L87 Difference]: Start difference. First operand 3962 states and 4429 transitions. Second operand has 68 states, 68 states have (on average 5.132352941176471) internal successors, (349), 68 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 18:46:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:34,430 INFO L93 Difference]: Finished difference Result 8368 states and 9329 transitions. [2021-12-06 18:46:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:46:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 5.132352941176471) internal successors, (349), 68 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 131 [2021-12-06 18:46:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:34,434 INFO L225 Difference]: With dead ends: 8368 [2021-12-06 18:46:34,434 INFO L226 Difference]: Without dead ends: 8257 [2021-12-06 18:46:34,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 8 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=375, Invalid=8000, Unknown=1, NotChecked=180, Total=8556 [2021-12-06 18:46:34,435 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 175 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 3445 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1005 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:34,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 3445 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1624 Invalid, 0 Unknown, 1005 Unchecked, 0.5s Time] [2021-12-06 18:46:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2021-12-06 18:46:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 6603. [2021-12-06 18:46:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 6601 states have (on average 1.1178609301620968) internal successors, (7379), 6602 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 7379 transitions. [2021-12-06 18:46:34,484 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 7379 transitions. Word has length 131 [2021-12-06 18:46:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:34,484 INFO L470 AbstractCegarLoop]: Abstraction has 6603 states and 7379 transitions. [2021-12-06 18:46:34,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 5.132352941176471) internal successors, (349), 68 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 18:46:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 7379 transitions. [2021-12-06 18:46:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 18:46:34,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:34,488 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:34,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 18:46:34,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:34,690 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:34,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1092548019, now seen corresponding path program 17 times [2021-12-06 18:46:34,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:34,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485535382] [2021-12-06 18:46:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:34,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 347 proven. 251 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:35,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485535382] [2021-12-06 18:46:35,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485535382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:35,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419166196] [2021-12-06 18:46:35,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:46:35,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:35,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:35,018 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:35,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 18:46:35,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-06 18:46:35,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 18:46:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:35,221 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:46:35,222 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 18:46:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 408 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:35,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 408 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:36,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419166196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:36,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:36,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 69 [2021-12-06 18:46:36,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007785138] [2021-12-06 18:46:36,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:36,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 18:46:36,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 18:46:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=3967, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:46:36,519 INFO L87 Difference]: Start difference. First operand 6603 states and 7379 transitions. Second operand has 69 states, 69 states have (on average 4.565217391304348) internal successors, (315), 69 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:40,219 INFO L93 Difference]: Finished difference Result 13164 states and 14292 transitions. [2021-12-06 18:46:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 18:46:40,219 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.565217391304348) internal successors, (315), 69 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-06 18:46:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:40,225 INFO L225 Difference]: With dead ends: 13164 [2021-12-06 18:46:40,226 INFO L226 Difference]: Without dead ends: 11810 [2021-12-06 18:46:40,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7043 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5664, Invalid=20096, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 18:46:40,227 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2361 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2361 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:40,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2361 Valid, 1934 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 18:46:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11810 states. [2021-12-06 18:46:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11810 to 6720. [2021-12-06 18:46:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6720 states, 6718 states have (on average 1.1168502530515034) internal successors, (7503), 6719 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6720 states to 6720 states and 7503 transitions. [2021-12-06 18:46:40,289 INFO L78 Accepts]: Start accepts. Automaton has 6720 states and 7503 transitions. Word has length 132 [2021-12-06 18:46:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:40,289 INFO L470 AbstractCegarLoop]: Abstraction has 6720 states and 7503 transitions. [2021-12-06 18:46:40,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.565217391304348) internal successors, (315), 69 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6720 states and 7503 transitions. [2021-12-06 18:46:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 18:46:40,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:40,292 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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 18:46:40,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:40,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:40,493 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1138351353, now seen corresponding path program 13 times [2021-12-06 18:46:40,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:40,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139734038] [2021-12-06 18:46:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:40,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 326 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:40,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139734038] [2021-12-06 18:46:40,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139734038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426258101] [2021-12-06 18:46:40,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:46:40,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:40,712 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:40,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 18:46:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:40,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 18:46:40,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:40,848 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 18:46:40,850 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 18:46:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 66 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:41,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 91 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426258101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:42,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:42,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2021-12-06 18:46:42,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766501611] [2021-12-06 18:46:42,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:42,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 18:46:42,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 18:46:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 18:46:42,086 INFO L87 Difference]: Start difference. First operand 6720 states and 7503 transitions. Second operand has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:43,439 INFO L93 Difference]: Finished difference Result 8825 states and 9841 transitions. [2021-12-06 18:46:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:46:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 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 135 [2021-12-06 18:46:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:43,445 INFO L225 Difference]: With dead ends: 8825 [2021-12-06 18:46:43,445 INFO L226 Difference]: Without dead ends: 8825 [2021-12-06 18:46:43,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1161, Invalid=5159, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 18:46:43,446 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 759 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:43,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1943 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:46:43,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-12-06 18:46:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 7171. [2021-12-06 18:46:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7171 states, 7169 states have (on average 1.1168921746408147) internal successors, (8007), 7170 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7171 states to 7171 states and 8007 transitions. [2021-12-06 18:46:43,505 INFO L78 Accepts]: Start accepts. Automaton has 7171 states and 8007 transitions. Word has length 135 [2021-12-06 18:46:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:43,511 INFO L470 AbstractCegarLoop]: Abstraction has 7171 states and 8007 transitions. [2021-12-06 18:46:43,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7171 states and 8007 transitions. [2021-12-06 18:46:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 18:46:43,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:43,515 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:46:43,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 18:46:43,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:43,717 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash -915181808, now seen corresponding path program 18 times [2021-12-06 18:46:43,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:43,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885153248] [2021-12-06 18:46:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:43,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:44,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:44,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885153248] [2021-12-06 18:46:44,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885153248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761402797] [2021-12-06 18:46:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:46:44,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:44,151 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:44,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 18:46:44,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 18:46:44,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 18:46:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:44,786 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 18:46:45,073 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 18:46:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:45,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:45,261 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 18:46:45,262 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 18:46:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:45,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761402797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:45,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:45,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 55 [2021-12-06 18:46:45,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608461716] [2021-12-06 18:46:45,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:45,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 18:46:45,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:45,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 18:46:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2808, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 18:46:45,414 INFO L87 Difference]: Start difference. First operand 7171 states and 8007 transitions. Second operand has 55 states, 55 states have (on average 3.963636363636364) internal successors, (218), 55 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:48,018 INFO L93 Difference]: Finished difference Result 10990 states and 12174 transitions. [2021-12-06 18:46:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 18:46:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.963636363636364) internal successors, (218), 55 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-06 18:46:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:48,024 INFO L225 Difference]: With dead ends: 10990 [2021-12-06 18:46:48,024 INFO L226 Difference]: Without dead ends: 10348 [2021-12-06 18:46:48,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 247 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=581, Invalid=6391, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 18:46:48,025 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 1212 mSDsluCounter, 7890 mSDsCounter, 0 mSdLazyCounter, 6232 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 8151 SdHoareTripleChecker+Invalid, 6453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 6232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:48,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 8151 Invalid, 6453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 6232 Invalid, 0 Unknown, 128 Unchecked, 1.7s Time] [2021-12-06 18:46:48,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10348 states. [2021-12-06 18:46:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10348 to 7199. [2021-12-06 18:46:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7197 states have (on average 1.1167152980408503) internal successors, (8037), 7198 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 8037 transitions. [2021-12-06 18:46:48,085 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 8037 transitions. Word has length 136 [2021-12-06 18:46:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 7199 states and 8037 transitions. [2021-12-06 18:46:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.963636363636364) internal successors, (218), 55 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 8037 transitions. [2021-12-06 18:46:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 18:46:48,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:48,088 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:46:48,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:48,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:48,289 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1241386515, now seen corresponding path program 19 times [2021-12-06 18:46:48,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:48,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543451473] [2021-12-06 18:46:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:48,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:48,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543451473] [2021-12-06 18:46:48,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543451473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504779344] [2021-12-06 18:46:48,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:46:48,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:48,651 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 18:46:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:48,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 18:46:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:49,881 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 18:46:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504779344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:49,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:49,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 62 [2021-12-06 18:46:49,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398932270] [2021-12-06 18:46:49,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:49,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 18:46:49,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 18:46:49,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3542, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:46:49,965 INFO L87 Difference]: Start difference. First operand 7199 states and 8037 transitions. Second operand has 63 states, 62 states have (on average 4.645161290322581) internal successors, (288), 63 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 18:46:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:52,792 INFO L93 Difference]: Finished difference Result 11014 states and 12190 transitions. [2021-12-06 18:46:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:46:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.645161290322581) internal successors, (288), 63 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 140 [2021-12-06 18:46:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:52,798 INFO L225 Difference]: With dead ends: 11014 [2021-12-06 18:46:52,798 INFO L226 Difference]: Without dead ends: 11014 [2021-12-06 18:46:52,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1908, Invalid=8192, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 18:46:52,799 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1572 mSDsluCounter, 3683 mSDsCounter, 0 mSdLazyCounter, 5755 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 5863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:52,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 3833 Invalid, 5863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5755 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:46:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11014 states. [2021-12-06 18:46:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11014 to 7313. [2021-12-06 18:46:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7313 states, 7311 states have (on average 1.1173574066475174) internal successors, (8169), 7312 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7313 states to 7313 states and 8169 transitions. [2021-12-06 18:46:52,862 INFO L78 Accepts]: Start accepts. Automaton has 7313 states and 8169 transitions. Word has length 140 [2021-12-06 18:46:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:52,862 INFO L470 AbstractCegarLoop]: Abstraction has 7313 states and 8169 transitions. [2021-12-06 18:46:52,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.645161290322581) internal successors, (288), 63 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 18:46:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7313 states and 8169 transitions. [2021-12-06 18:46:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 18:46:52,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:52,866 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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 18:46:52,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:53,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:53,067 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2041039411, now seen corresponding path program 8 times [2021-12-06 18:46:53,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:53,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856766313] [2021-12-06 18:46:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:53,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:46:53,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856766313] [2021-12-06 18:46:53,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856766313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442450392] [2021-12-06 18:46:53,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:46:53,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:53,345 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:53,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 18:46:53,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:46:53,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:46:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:53,496 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 18:46:53,771 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 18:46:53,818 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 18:46:54,406 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:46:54,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 18:46:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 18 proven. 369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:46:54,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:54,844 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2668 (Array Int Int)) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_261| Int)) (or (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_261| 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_261|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2668) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_261| 6)) 0))) is different from false [2021-12-06 18:46:54,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:54,854 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 18:46:54,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:54,859 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 18:46:54,862 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 18:46:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 13 proven. 374 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:46:55,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442450392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:55,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:55,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 27] total 63 [2021-12-06 18:46:55,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996618049] [2021-12-06 18:46:55,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:55,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 18:46:55,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 18:46:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3588, Unknown=1, NotChecked=120, Total=3906 [2021-12-06 18:46:55,577 INFO L87 Difference]: Start difference. First operand 7313 states and 8169 transitions. Second operand has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:56,891 INFO L93 Difference]: Finished difference Result 7234 states and 8073 transitions. [2021-12-06 18:46:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:46:56,891 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 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 141 [2021-12-06 18:46:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:56,894 INFO L225 Difference]: With dead ends: 7234 [2021-12-06 18:46:56,894 INFO L226 Difference]: Without dead ends: 5044 [2021-12-06 18:46:56,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=329, Invalid=5680, Unknown=1, NotChecked=152, Total=6162 [2021-12-06 18:46:56,894 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 261 mSDsluCounter, 3269 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 533 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:56,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 3366 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2638 Invalid, 0 Unknown, 533 Unchecked, 0.8s Time] [2021-12-06 18:46:56,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2021-12-06 18:46:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 4608. [2021-12-06 18:46:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4606 states have (on average 1.1170212765957446) internal successors, (5145), 4607 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 5145 transitions. [2021-12-06 18:46:56,927 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 5145 transitions. Word has length 141 [2021-12-06 18:46:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:56,927 INFO L470 AbstractCegarLoop]: Abstraction has 4608 states and 5145 transitions. [2021-12-06 18:46:56,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 5145 transitions. [2021-12-06 18:46:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:46:56,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:56,929 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:46:56,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:57,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-12-06 18:46:57,131 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:46:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1268672449, now seen corresponding path program 20 times [2021-12-06 18:46:57,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:57,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527377637] [2021-12-06 18:46:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:57,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:57,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:57,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527377637] [2021-12-06 18:46:57,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527377637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:57,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750216023] [2021-12-06 18:46:57,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:46:57,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:57,549 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:57,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 18:46:57,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:46:57,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 18:46:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:57,968 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 18:46:58,234 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 18:46:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:58,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:58,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 18:46:58,401 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 18:46:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:58,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750216023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:58,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:46:58,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 58 [2021-12-06 18:46:58,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510264670] [2021-12-06 18:46:58,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:58,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 18:46:58,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 18:46:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3136, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 18:46:58,563 INFO L87 Difference]: Start difference. First operand 4608 states and 5145 transitions. Second operand has 58 states, 58 states have (on average 4.0) internal successors, (232), 58 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:01,494 INFO L93 Difference]: Finished difference Result 8084 states and 8951 transitions. [2021-12-06 18:47:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:47:01,495 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.0) internal successors, (232), 58 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-12-06 18:47:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:01,498 INFO L225 Difference]: With dead ends: 8084 [2021-12-06 18:47:01,499 INFO L226 Difference]: Without dead ends: 7208 [2021-12-06 18:47:01,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=564, Invalid=7446, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 18:47:01,499 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 1520 mSDsluCounter, 9026 mSDsCounter, 0 mSdLazyCounter, 6973 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 9311 SdHoareTripleChecker+Invalid, 7518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 6973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:01,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 9311 Invalid, 7518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 6973 Invalid, 0 Unknown, 340 Unchecked, 2.0s Time] [2021-12-06 18:47:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2021-12-06 18:47:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 5272. [2021-12-06 18:47:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5272 states, 5270 states have (on average 1.1193548387096774) internal successors, (5899), 5271 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 5899 transitions. [2021-12-06 18:47:01,540 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 5899 transitions. Word has length 146 [2021-12-06 18:47:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:01,540 INFO L470 AbstractCegarLoop]: Abstraction has 5272 states and 5899 transitions. [2021-12-06 18:47:01,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.0) internal successors, (232), 58 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 5899 transitions. [2021-12-06 18:47:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 18:47:01,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:01,543 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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 18:47:01,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-06 18:47:01,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-06 18:47:01,744 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:47:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash 776648806, now seen corresponding path program 14 times [2021-12-06 18:47:01,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:01,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362197505] [2021-12-06 18:47:01,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:01,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:02,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362197505] [2021-12-06 18:47:02,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362197505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702285441] [2021-12-06 18:47:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:47:02,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:02,273 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:02,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 18:47:02,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:47:02,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:02,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-06 18:47:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:02,418 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 18:47:02,808 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 18:47:02,862 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 18:47:05,226 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-06 18:47:05,226 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 48 treesize of output 20 [2021-12-06 18:47:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:05,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:05,755 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2795 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2795) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select v_ArrVal_2795 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse2 (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (or (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) .cse1)) (= .cse2 0) (not (= .cse1 .cse2)))))) is different from false [2021-12-06 18:47:05,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:47:05,762 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 72 treesize of output 50 [2021-12-06 18:47:05,775 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-06 18:47:05,775 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 93 treesize of output 88 [2021-12-06 18:47:05,791 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-06 18:47:05,791 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 60 treesize of output 62 [2021-12-06 18:47:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 27 proven. 436 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:06,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702285441] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:06,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:06,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 79 [2021-12-06 18:47:06,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429127740] [2021-12-06 18:47:06,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:06,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 18:47:06,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 18:47:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=5740, Unknown=1, NotChecked=152, Total=6162 [2021-12-06 18:47:06,547 INFO L87 Difference]: Start difference. First operand 5272 states and 5899 transitions. Second operand has 79 states, 79 states have (on average 4.329113924050633) internal successors, (342), 79 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 18:47:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:09,230 INFO L93 Difference]: Finished difference Result 13911 states and 15574 transitions. [2021-12-06 18:47:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 18:47:09,231 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.329113924050633) internal successors, (342), 79 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 148 [2021-12-06 18:47:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:09,239 INFO L225 Difference]: With dead ends: 13911 [2021-12-06 18:47:09,239 INFO L226 Difference]: Without dead ends: 13783 [2021-12-06 18:47:09,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 249 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=638, Invalid=10707, Unknown=1, NotChecked=210, Total=11556 [2021-12-06 18:47:09,239 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 812 mSDsluCounter, 7342 mSDsCounter, 0 mSdLazyCounter, 3467 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 7532 SdHoareTripleChecker+Invalid, 6845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3307 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:09,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 7532 Invalid, 6845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3467 Invalid, 0 Unknown, 3307 Unchecked, 1.1s Time] [2021-12-06 18:47:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-12-06 18:47:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 8604. [2021-12-06 18:47:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8604 states, 8602 states have (on average 1.1198558474773308) internal successors, (9633), 8603 states have internal predecessors, (9633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8604 states to 8604 states and 9633 transitions. [2021-12-06 18:47:09,332 INFO L78 Accepts]: Start accepts. Automaton has 8604 states and 9633 transitions. Word has length 148 [2021-12-06 18:47:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:09,332 INFO L470 AbstractCegarLoop]: Abstraction has 8604 states and 9633 transitions. [2021-12-06 18:47:09,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.329113924050633) internal successors, (342), 79 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 18:47:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8604 states and 9633 transitions. [2021-12-06 18:47:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 18:47:09,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:09,335 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:09,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 18:47:09,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:09,536 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:47:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash 182499934, now seen corresponding path program 21 times [2021-12-06 18:47:09,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866505529] [2021-12-06 18:47:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 231 proven. 575 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:09,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866505529] [2021-12-06 18:47:09,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866505529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280381974] [2021-12-06 18:47:09,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:47:09,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:09,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:09,991 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:09,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 18:47:10,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 18:47:10,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 18:47:10,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:11,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:11,742 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 7 treesize of output 5 [2021-12-06 18:47:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:11,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280381974] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:11,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:11,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 80 [2021-12-06 18:47:11,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969617272] [2021-12-06 18:47:11,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:11,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:47:11,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:47:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=5573, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:47:11,812 INFO L87 Difference]: Start difference. First operand 8604 states and 9633 transitions. Second operand has 81 states, 80 states have (on average 4.7625) internal successors, (381), 81 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:13,813 INFO L93 Difference]: Finished difference Result 12618 states and 13988 transitions. [2021-12-06 18:47:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:47:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 4.7625) internal successors, (381), 81 states have internal predecessors, (381), 0 states have call successors, (0), 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 18:47:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:13,821 INFO L225 Difference]: With dead ends: 12618 [2021-12-06 18:47:13,821 INFO L226 Difference]: Without dead ends: 12618 [2021-12-06 18:47:13,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2273, Invalid=9717, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 18:47:13,822 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1864 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 3643 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:13,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 2507 Invalid, 3787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3643 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 18:47:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12618 states. [2021-12-06 18:47:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12618 to 8724. [2021-12-06 18:47:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8724 states, 8722 states have (on average 1.1203852327447834) internal successors, (9772), 8723 states have internal predecessors, (9772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 9772 transitions. [2021-12-06 18:47:13,900 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 9772 transitions. Word has length 150 [2021-12-06 18:47:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:13,900 INFO L470 AbstractCegarLoop]: Abstraction has 8724 states and 9772 transitions. [2021-12-06 18:47:13,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 4.7625) internal successors, (381), 81 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 9772 transitions. [2021-12-06 18:47:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-06 18:47:13,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:13,904 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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 18:47:13,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 18:47:14,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-06 18:47:14,105 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:47:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash -325786877, now seen corresponding path program 15 times [2021-12-06 18:47:14,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:14,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079746430] [2021-12-06 18:47:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:14,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 66 proven. 426 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:14,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:14,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079746430] [2021-12-06 18:47:14,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079746430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:14,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916698623] [2021-12-06 18:47:14,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:47:14,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:14,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:14,357 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:14,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 18:47:14,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:47:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:47:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 91 proven. 401 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:15,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:15,502 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 18:47:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 91 proven. 401 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:15,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916698623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:15,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:15,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 51 [2021-12-06 18:47:15,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868068999] [2021-12-06 18:47:15,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:15,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 18:47:15,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:15,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 18:47:15,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 18:47:15,559 INFO L87 Difference]: Start difference. First operand 8724 states and 9772 transitions. Second operand has 52 states, 51 states have (on average 8.0) internal successors, (408), 52 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:16,370 INFO L93 Difference]: Finished difference Result 15111 states and 16941 transitions. [2021-12-06 18:47:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:47:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 8.0) internal successors, (408), 52 states have internal predecessors, (408), 0 states have call successors, (0), 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 152 [2021-12-06 18:47:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:16,379 INFO L225 Difference]: With dead ends: 15111 [2021-12-06 18:47:16,379 INFO L226 Difference]: Without dead ends: 15111 [2021-12-06 18:47:16,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=3995, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:47:16,380 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 999 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:16,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 1708 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:47:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15111 states. [2021-12-06 18:47:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15111 to 9266. [2021-12-06 18:47:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9266 states, 9264 states have (on average 1.1204663212435233) internal successors, (10380), 9265 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9266 states to 9266 states and 10380 transitions. [2021-12-06 18:47:16,465 INFO L78 Accepts]: Start accepts. Automaton has 9266 states and 10380 transitions. Word has length 152 [2021-12-06 18:47:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:16,466 INFO L470 AbstractCegarLoop]: Abstraction has 9266 states and 10380 transitions. [2021-12-06 18:47:16,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 8.0) internal successors, (408), 52 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 9266 states and 10380 transitions. [2021-12-06 18:47:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 18:47:16,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:16,469 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:47:16,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 18:47:16,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:16,670 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:47:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash 971462514, now seen corresponding path program 22 times [2021-12-06 18:47:16,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:16,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507891716] [2021-12-06 18:47:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:16,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:17,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:17,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507891716] [2021-12-06 18:47:17,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507891716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:17,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444204647] [2021-12-06 18:47:17,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:47:17,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:17,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:17,144 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:17,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 18:47:17,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:47:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 18:47:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:17,294 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:47:17,294 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 18:47:17,976 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 18:47:19,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:47:19,731 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 18:47:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 534 proven. 351 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:19,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:20,944 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 18:47:20,946 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 18:47:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 509 proven. 376 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:22,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444204647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:22,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:22,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 103 [2021-12-06 18:47:22,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63155160] [2021-12-06 18:47:22,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:22,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-06 18:47:22,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-06 18:47:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=9614, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 18:47:22,303 INFO L87 Difference]: Start difference. First operand 9266 states and 10380 transitions. Second operand has 103 states, 103 states have (on average 4.349514563106796) internal successors, (448), 103 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:26,180 INFO L93 Difference]: Finished difference Result 10613 states and 11872 transitions. [2021-12-06 18:47:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 18:47:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 4.349514563106796) internal successors, (448), 103 states have internal predecessors, (448), 0 states have call successors, (0), 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 156 [2021-12-06 18:47:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:26,187 INFO L225 Difference]: With dead ends: 10613 [2021-12-06 18:47:26,188 INFO L226 Difference]: Without dead ends: 10504 [2021-12-06 18:47:26,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 270 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7261 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2507, Invalid=24553, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 18:47:26,189 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 417 mSDsluCounter, 3651 mSDsCounter, 0 mSdLazyCounter, 3076 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 3757 SdHoareTripleChecker+Invalid, 3541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:26,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 3757 Invalid, 3541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3076 Invalid, 0 Unknown, 382 Unchecked, 0.9s Time] [2021-12-06 18:47:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-12-06 18:47:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 9893. [2021-12-06 18:47:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9893 states, 9891 states have (on average 1.122030128399555) internal successors, (11098), 9892 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 11098 transitions. [2021-12-06 18:47:26,264 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 11098 transitions. Word has length 156 [2021-12-06 18:47:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:26,265 INFO L470 AbstractCegarLoop]: Abstraction has 9893 states and 11098 transitions. [2021-12-06 18:47:26,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 4.349514563106796) internal successors, (448), 103 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 11098 transitions. [2021-12-06 18:47:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 18:47:26,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:26,269 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:26,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 18:47:26,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-06 18:47:26,470 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:47:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:26,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1703255727, now seen corresponding path program 9 times [2021-12-06 18:47:26,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:26,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142878713] [2021-12-06 18:47:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:26,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 127 proven. 378 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:47:26,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:26,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142878713] [2021-12-06 18:47:26,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142878713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:26,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490673855] [2021-12-06 18:47:26,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:47:26,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:26,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:26,779 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:26,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 18:47:27,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:47:27,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:27,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 139 conjunts are in the unsatisfiable core [2021-12-06 18:47:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:27,063 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:47:27,063 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 18:47:27,558 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 18:47:27,610 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:47:27,610 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 18:47:27,614 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 8 treesize of output 3 [2021-12-06 18:47:32,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:32,301 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-12-06 18:47:32,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 85 [2021-12-06 18:47:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:32,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:40,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:47:40,942 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 55 treesize of output 44 [2021-12-06 18:47:40,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:47:40,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:47:40,958 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 80 treesize of output 87 [2021-12-06 18:47:40,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:47:40,993 INFO L354 Elim1Store]: treesize reduction 14, result has 74.5 percent of original size [2021-12-06 18:47:40,993 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 159 treesize of output 131 [2021-12-06 18:47:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:44,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490673855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:44,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:44,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 46, 46] total 112 [2021-12-06 18:47:44,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627863194] [2021-12-06 18:47:44,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:44,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-12-06 18:47:44,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:44,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-12-06 18:47:44,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=11916, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 18:47:44,256 INFO L87 Difference]: Start difference. First operand 9893 states and 11098 transitions. Second operand has 112 states, 112 states have (on average 4.080357142857143) internal successors, (457), 112 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:03,452 INFO L93 Difference]: Finished difference Result 14637 states and 16399 transitions. [2021-12-06 18:48:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-06 18:48:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 4.080357142857143) internal successors, (457), 112 states have internal predecessors, (457), 0 states have call successors, (0), 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 158 [2021-12-06 18:48:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:03,457 INFO L225 Difference]: With dead ends: 14637 [2021-12-06 18:48:03,457 INFO L226 Difference]: Without dead ends: 9160 [2021-12-06 18:48:03,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10215 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=2739, Invalid=46323, Unknown=0, NotChecked=0, Total=49062 [2021-12-06 18:48:03,459 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1689 mSDsluCounter, 5102 mSDsCounter, 0 mSdLazyCounter, 9813 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 5208 SdHoareTripleChecker+Invalid, 11921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 9813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1807 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:03,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 5208 Invalid, 11921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 9813 Invalid, 0 Unknown, 1807 Unchecked, 6.1s Time] [2021-12-06 18:48:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2021-12-06 18:48:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 6678. [2021-12-06 18:48:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 6676 states have (on average 1.122228879568604) internal successors, (7492), 6677 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 7492 transitions. [2021-12-06 18:48:03,519 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 7492 transitions. Word has length 158 [2021-12-06 18:48:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:03,519 INFO L470 AbstractCegarLoop]: Abstraction has 6678 states and 7492 transitions. [2021-12-06 18:48:03,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 4.080357142857143) internal successors, (457), 112 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 7492 transitions. [2021-12-06 18:48:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 18:48:03,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:03,522 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:03,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 18:48:03,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:03,723 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:48:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash -533935665, now seen corresponding path program 23 times [2021-12-06 18:48:03,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:03,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480821717] [2021-12-06 18:48:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:03,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:04,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480821717] [2021-12-06 18:48:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480821717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70683741] [2021-12-06 18:48:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:48:04,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:04,172 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:04,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 18:48:04,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 18:48:04,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:48:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 18:48:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:04,460 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:48:04,460 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 18:48:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:05,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 378 proven. 560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:07,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70683741] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:07,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:07,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 93 [2021-12-06 18:48:07,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713161793] [2021-12-06 18:48:07,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:07,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 18:48:07,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:07,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 18:48:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1049, Invalid=7693, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:48:07,223 INFO L87 Difference]: Start difference. First operand 6678 states and 7492 transitions. Second operand has 94 states, 93 states have (on average 4.838709677419355) internal successors, (450), 94 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:10,612 INFO L93 Difference]: Finished difference Result 10846 states and 12077 transitions. [2021-12-06 18:48:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 18:48:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 4.838709677419355) internal successors, (450), 94 states have internal predecessors, (450), 0 states have call successors, (0), 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 160 [2021-12-06 18:48:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:10,618 INFO L225 Difference]: With dead ends: 10846 [2021-12-06 18:48:10,618 INFO L226 Difference]: Without dead ends: 10846 [2021-12-06 18:48:10,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4127 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3623, Invalid=15009, Unknown=0, NotChecked=0, Total=18632 [2021-12-06 18:48:10,619 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 1505 mSDsluCounter, 3857 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 4030 SdHoareTripleChecker+Invalid, 6409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:10,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 4030 Invalid, 6409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 18:48:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10846 states. [2021-12-06 18:48:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10846 to 7981. [2021-12-06 18:48:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7979 states have (on average 1.1287128712871286) internal successors, (9006), 7980 states have internal predecessors, (9006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 9006 transitions. [2021-12-06 18:48:10,686 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 9006 transitions. Word has length 160 [2021-12-06 18:48:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:10,686 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 9006 transitions. [2021-12-06 18:48:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 4.838709677419355) internal successors, (450), 94 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 9006 transitions. [2021-12-06 18:48:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 18:48:10,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:10,690 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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 18:48:10,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 18:48:10,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:10,890 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:48:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:10,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1885131242, now seen corresponding path program 16 times [2021-12-06 18:48:10,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:10,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841945438] [2021-12-06 18:48:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:10,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 17 proven. 580 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:11,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841945438] [2021-12-06 18:48:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841945438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864022825] [2021-12-06 18:48:11,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:48:11,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:11,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:11,416 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:11,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 18:48:11,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:48:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:48:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 18:48:11,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:11,586 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:48:11,586 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 18:48:12,425 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 18:48:12,501 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:48:12,501 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 18:48:12,505 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 18:48:36,798 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:48:36,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-12-06 18:48:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:37,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:48:37,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 17 [2021-12-06 18:48:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 324 proven. 209 refuted. 65 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:37,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:42,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:48:42,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2021-12-06 18:48:42,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:48:42,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:48:42,075 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 89 treesize of output 92 [2021-12-06 18:48:42,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:48:42,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:48:42,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2021-12-06 18:48:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 309 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:45,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864022825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:45,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:45,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 37, 38] total 99 [2021-12-06 18:48:45,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636057056] [2021-12-06 18:48:45,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:45,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 18:48:45,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 18:48:45,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=9027, Unknown=6, NotChecked=0, Total=9702 [2021-12-06 18:48:45,153 INFO L87 Difference]: Start difference. First operand 7981 states and 9006 transitions. Second operand has 99 states, 99 states have (on average 4.767676767676767) internal successors, (472), 99 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:59,014 INFO L93 Difference]: Finished difference Result 17040 states and 19242 transitions. [2021-12-06 18:48:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-06 18:48:59,014 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.767676767676767) internal successors, (472), 99 states have internal predecessors, (472), 0 states have call successors, (0), 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 18:48:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:59,023 INFO L225 Difference]: With dead ends: 17040 [2021-12-06 18:48:59,024 INFO L226 Difference]: Without dead ends: 16907 [2021-12-06 18:48:59,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 293 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=2590, Invalid=36806, Unknown=6, NotChecked=0, Total=39402 [2021-12-06 18:48:59,025 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 743 mSDsluCounter, 3433 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 4320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1756 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:59,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 3514 Invalid, 4320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2456 Invalid, 0 Unknown, 1756 Unchecked, 0.9s Time] [2021-12-06 18:48:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16907 states. [2021-12-06 18:48:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16907 to 13909. [2021-12-06 18:48:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13909 states, 13907 states have (on average 1.1300064715610842) internal successors, (15715), 13908 states have internal predecessors, (15715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13909 states to 13909 states and 15715 transitions. [2021-12-06 18:48:59,150 INFO L78 Accepts]: Start accepts. Automaton has 13909 states and 15715 transitions. Word has length 165 [2021-12-06 18:48:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:59,150 INFO L470 AbstractCegarLoop]: Abstraction has 13909 states and 15715 transitions. [2021-12-06 18:48:59,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.767676767676767) internal successors, (472), 99 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 13909 states and 15715 transitions. [2021-12-06 18:48:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 18:48:59,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:59,156 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:48:59,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 18:48:59,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:59,357 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:48:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:59,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1119072733, now seen corresponding path program 24 times [2021-12-06 18:48:59,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:59,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84472369] [2021-12-06 18:48:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:59,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:59,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84472369] [2021-12-06 18:48:59,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84472369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705458843] [2021-12-06 18:48:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:48:59,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:59,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:59,938 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:59,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 18:49:00,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 18:49:00,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:00,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 18:49:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:01,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:49:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:01,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:01,714 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 18:49:01,715 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 18:49:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:01,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705458843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:01,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:01,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 66 [2021-12-06 18:49:01,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327059229] [2021-12-06 18:49:01,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:01,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 18:49:01,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:01,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 18:49:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4096, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 18:49:01,900 INFO L87 Difference]: Start difference. First operand 13909 states and 15715 transitions. Second operand has 66 states, 66 states have (on average 3.984848484848485) internal successors, (263), 66 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 18:49:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:05,700 INFO L93 Difference]: Finished difference Result 21545 states and 24129 transitions. [2021-12-06 18:49:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:49:05,701 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.984848484848485) internal successors, (263), 66 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 166 [2021-12-06 18:49:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:05,712 INFO L225 Difference]: With dead ends: 21545 [2021-12-06 18:49:05,713 INFO L226 Difference]: Without dead ends: 20340 [2021-12-06 18:49:05,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 302 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=635, Invalid=9667, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 18:49:05,713 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1689 mSDsluCounter, 11137 mSDsCounter, 0 mSdLazyCounter, 8673 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 11471 SdHoareTripleChecker+Invalid, 9396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 8673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 516 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:05,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 11471 Invalid, 9396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 8673 Invalid, 0 Unknown, 516 Unchecked, 2.6s Time] [2021-12-06 18:49:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20340 states. [2021-12-06 18:49:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20340 to 15630. [2021-12-06 18:49:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15630 states, 15628 states have (on average 1.1311748144356284) internal successors, (17678), 15629 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 18:49:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15630 states to 15630 states and 17678 transitions. [2021-12-06 18:49:05,858 INFO L78 Accepts]: Start accepts. Automaton has 15630 states and 17678 transitions. Word has length 166 [2021-12-06 18:49:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 15630 states and 17678 transitions. [2021-12-06 18:49:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.984848484848485) internal successors, (263), 66 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 18:49:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 15630 states and 17678 transitions. [2021-12-06 18:49:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-06 18:49:05,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:05,864 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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 18:49:05,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 18:49:06,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:06,065 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:49:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:06,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1273205997, now seen corresponding path program 17 times [2021-12-06 18:49:06,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:06,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225682426] [2021-12-06 18:49:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:06,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 91 proven. 539 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:06,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:06,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225682426] [2021-12-06 18:49:06,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225682426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:06,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250999433] [2021-12-06 18:49:06,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:49:06,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:06,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:06,377 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:06,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 18:49:06,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 18:49:06,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 18:49:06,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 120 proven. 510 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:07,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:07,617 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 18:49:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 120 proven. 510 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:07,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250999433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:07,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:07,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2021-12-06 18:49:07,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639569616] [2021-12-06 18:49:07,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:07,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 18:49:07,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:07,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 18:49:07,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:49:07,942 INFO L87 Difference]: Start difference. First operand 15630 states and 17678 transitions. Second operand has 56 states, 55 states have (on average 7.163636363636364) internal successors, (394), 56 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:09,137 INFO L93 Difference]: Finished difference Result 25519 states and 28878 transitions. [2021-12-06 18:49:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:49:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 7.163636363636364) internal successors, (394), 56 states have internal predecessors, (394), 0 states have call successors, (0), 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 18:49:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:09,152 INFO L225 Difference]: With dead ends: 25519 [2021-12-06 18:49:09,153 INFO L226 Difference]: Without dead ends: 25519 [2021-12-06 18:49:09,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1219, Invalid=4633, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 18:49:09,153 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1429 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:09,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 2470 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:49:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25519 states. [2021-12-06 18:49:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25519 to 16361. [2021-12-06 18:49:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16361 states, 16359 states have (on average 1.1311204841371723) internal successors, (18504), 16360 states have internal predecessors, (18504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16361 states to 16361 states and 18504 transitions. [2021-12-06 18:49:09,336 INFO L78 Accepts]: Start accepts. Automaton has 16361 states and 18504 transitions. Word has length 169 [2021-12-06 18:49:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:09,336 INFO L470 AbstractCegarLoop]: Abstraction has 16361 states and 18504 transitions. [2021-12-06 18:49:09,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 7.163636363636364) internal successors, (394), 56 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 16361 states and 18504 transitions. [2021-12-06 18:49:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-06 18:49:09,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:09,341 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:49:09,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-06 18:49:09,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:09,542 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:49:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash 12352, now seen corresponding path program 25 times [2021-12-06 18:49:09,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861328752] [2021-12-06 18:49:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:09,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 325 proven. 755 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:10,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861328752] [2021-12-06 18:49:10,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861328752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241920030] [2021-12-06 18:49:10,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:49:10,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:10,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:10,078 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 18:49:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 18:49:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:10,235 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:49:10,235 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 18:49:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:11,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 435 proven. 645 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241920030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:13,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:13,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 104 [2021-12-06 18:49:13,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897370595] [2021-12-06 18:49:13,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:13,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-06 18:49:13,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-06 18:49:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=9806, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 18:49:13,587 INFO L87 Difference]: Start difference. First operand 16361 states and 18504 transitions. Second operand has 105 states, 104 states have (on average 4.788461538461538) internal successors, (498), 105 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:18,853 INFO L93 Difference]: Finished difference Result 22146 states and 24800 transitions. [2021-12-06 18:49:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 18:49:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 4.788461538461538) internal successors, (498), 105 states have internal predecessors, (498), 0 states have call successors, (0), 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 170 [2021-12-06 18:49:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:18,866 INFO L225 Difference]: With dead ends: 22146 [2021-12-06 18:49:18,866 INFO L226 Difference]: Without dead ends: 22146 [2021-12-06 18:49:18,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5087, Invalid=21973, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 18:49:18,867 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 1934 mSDsluCounter, 4623 mSDsCounter, 0 mSdLazyCounter, 7362 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 4799 SdHoareTripleChecker+Invalid, 7488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 7362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:18,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1934 Valid, 4799 Invalid, 7488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 7362 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 18:49:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22146 states. [2021-12-06 18:49:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22146 to 16517. [2021-12-06 18:49:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16517 states, 16515 states have (on average 1.1313957008779898) internal successors, (18685), 16516 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 18:49:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16517 states to 16517 states and 18685 transitions. [2021-12-06 18:49:19,036 INFO L78 Accepts]: Start accepts. Automaton has 16517 states and 18685 transitions. Word has length 170 [2021-12-06 18:49:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:19,037 INFO L470 AbstractCegarLoop]: Abstraction has 16517 states and 18685 transitions. [2021-12-06 18:49:19,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 4.788461538461538) internal successors, (498), 105 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 16517 states and 18685 transitions. [2021-12-06 18:49:19,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 18:49:19,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:19,043 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 13, 13, 13, 13, 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 18:49:19,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-06 18:49:19,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:19,244 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:49:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 911176794, now seen corresponding path program 15 times [2021-12-06 18:49:19,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:19,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468528871] [2021-12-06 18:49:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:19,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 57 proven. 915 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:49:19,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:19,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468528871] [2021-12-06 18:49:19,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468528871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:19,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048347478] [2021-12-06 18:49:19,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:49:19,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:19,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:19,762 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:19,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 18:49:20,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-06 18:49:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 18:49:20,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:21,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:49:21,388 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 18:49:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 57 proven. 915 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:49:21,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:21,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 18:49:21,593 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 18:49:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 57 proven. 915 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:49:21,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048347478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:21,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:21,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 61 [2021-12-06 18:49:21,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388184375] [2021-12-06 18:49:21,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:21,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 18:49:21,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:21,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 18:49:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3482, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 18:49:21,769 INFO L87 Difference]: Start difference. First operand 16517 states and 18685 transitions. Second operand has 61 states, 61 states have (on average 4.622950819672131) internal successors, (282), 61 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:25,212 INFO L93 Difference]: Finished difference Result 21410 states and 23965 transitions. [2021-12-06 18:49:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 18:49:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.622950819672131) internal successors, (282), 61 states have internal predecessors, (282), 0 states have call successors, (0), 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 18:49:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:25,225 INFO L225 Difference]: With dead ends: 21410 [2021-12-06 18:49:25,225 INFO L226 Difference]: Without dead ends: 19961 [2021-12-06 18:49:25,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 319 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=651, Invalid=8091, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:49:25,226 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 1278 mSDsluCounter, 9928 mSDsCounter, 0 mSdLazyCounter, 7708 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 10237 SdHoareTripleChecker+Invalid, 7973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 7708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:25,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 10237 Invalid, 7973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 7708 Invalid, 0 Unknown, 142 Unchecked, 2.3s Time] [2021-12-06 18:49:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19961 states. [2021-12-06 18:49:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19961 to 15421. [2021-12-06 18:49:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15421 states, 15419 states have (on average 1.127505026266295) internal successors, (17385), 15420 states have internal predecessors, (17385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15421 states to 15421 states and 17385 transitions. [2021-12-06 18:49:25,364 INFO L78 Accepts]: Start accepts. Automaton has 15421 states and 17385 transitions. Word has length 173 [2021-12-06 18:49:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:25,365 INFO L470 AbstractCegarLoop]: Abstraction has 15421 states and 17385 transitions. [2021-12-06 18:49:25,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.622950819672131) internal successors, (282), 61 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 15421 states and 17385 transitions. [2021-12-06 18:49:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 18:49:25,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:25,370 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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 18:49:25,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-06 18:49:25,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:25,571 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:49:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2108414055, now seen corresponding path program 10 times [2021-12-06 18:49:25,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:25,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666580829] [2021-12-06 18:49:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:25,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 145 proven. 500 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:49:25,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:25,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666580829] [2021-12-06 18:49:25,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666580829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:25,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449251411] [2021-12-06 18:49:25,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:49:25,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:25,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:25,934 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:25,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 18:49:26,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:49:26,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 18:49:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:26,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:49:26,093 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 18:49:26,560 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 18:49:26,603 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 18:49:27,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:49:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:49:28,270 INFO L354 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2021-12-06 18:49:28,270 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 32 treesize of output 28 [2021-12-06 18:49:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 394 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:49:28,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:29,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:49:29,866 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 18:49:29,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:49:29,871 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 18:49:29,873 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 18:49:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 374 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:49:31,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449251411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:31,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:31,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31, 31] total 81 [2021-12-06 18:49:31,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895774544] [2021-12-06 18:49:31,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:31,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:49:31,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:49:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=6030, Unknown=1, NotChecked=0, Total=6480 [2021-12-06 18:49:31,028 INFO L87 Difference]: Start difference. First operand 15421 states and 17385 transitions. Second operand has 81 states, 81 states have (on average 6.1234567901234565) internal successors, (496), 81 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:33,038 INFO L93 Difference]: Finished difference Result 20763 states and 23355 transitions. [2021-12-06 18:49:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:49:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.1234567901234565) internal successors, (496), 81 states have internal predecessors, (496), 0 states have call successors, (0), 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 175 [2021-12-06 18:49:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:33,046 INFO L225 Difference]: With dead ends: 20763 [2021-12-06 18:49:33,046 INFO L226 Difference]: Without dead ends: 12320 [2021-12-06 18:49:33,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1130, Invalid=12911, Unknown=1, NotChecked=0, Total=14042 [2021-12-06 18:49:33,047 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 552 mSDsluCounter, 4307 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 4425 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1123 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:33,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 4425 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1476 Invalid, 0 Unknown, 1123 Unchecked, 0.5s Time] [2021-12-06 18:49:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12320 states. [2021-12-06 18:49:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12320 to 8802. [2021-12-06 18:49:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8802 states, 8800 states have (on average 1.1245454545454545) internal successors, (9896), 8801 states have internal predecessors, (9896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8802 states to 8802 states and 9896 transitions. [2021-12-06 18:49:33,121 INFO L78 Accepts]: Start accepts. Automaton has 8802 states and 9896 transitions. Word has length 175 [2021-12-06 18:49:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:33,121 INFO L470 AbstractCegarLoop]: Abstraction has 8802 states and 9896 transitions. [2021-12-06 18:49:33,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.1234567901234565) internal successors, (496), 81 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8802 states and 9896 transitions. [2021-12-06 18:49:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 18:49:33,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:33,125 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-06 18:49:33,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-06 18:49:33,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-06 18:49:33,326 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:49:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2011472940, now seen corresponding path program 26 times [2021-12-06 18:49:33,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:33,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134770234] [2021-12-06 18:49:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:33,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:33,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:33,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134770234] [2021-12-06 18:49:33,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134770234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:33,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630969469] [2021-12-06 18:49:33,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:49:33,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:33,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:33,941 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:33,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 18:49:34,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:49:34,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-06 18:49:34,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:34,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:49:37,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:49:37,160 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 18 [2021-12-06 18:49:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 378 proven. 793 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:37,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:39,295 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 18:49:39,297 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 18:49:39,300 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 18:49:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 378 proven. 793 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:39,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630969469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:39,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:39,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 103 [2021-12-06 18:49:39,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696038281] [2021-12-06 18:49:39,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:39,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-06 18:49:39,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-06 18:49:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=9816, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 18:49:39,381 INFO L87 Difference]: Start difference. First operand 8802 states and 9896 transitions. Second operand has 103 states, 103 states have (on average 4.378640776699029) internal successors, (451), 103 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:42,318 INFO L93 Difference]: Finished difference Result 12621 states and 14154 transitions. [2021-12-06 18:49:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 18:49:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 4.378640776699029) internal successors, (451), 103 states have internal predecessors, (451), 0 states have call successors, (0), 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 176 [2021-12-06 18:49:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:42,326 INFO L225 Difference]: With dead ends: 12621 [2021-12-06 18:49:42,326 INFO L226 Difference]: Without dead ends: 12497 [2021-12-06 18:49:42,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 331 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4637 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1111, Invalid=15145, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 18:49:42,327 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 1721 mSDsluCounter, 10797 mSDsCounter, 0 mSdLazyCounter, 3609 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 11121 SdHoareTripleChecker+Invalid, 5723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2079 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:42,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1721 Valid, 11121 Invalid, 5723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3609 Invalid, 0 Unknown, 2079 Unchecked, 1.2s Time] [2021-12-06 18:49:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12497 states. [2021-12-06 18:49:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12497 to 9696. [2021-12-06 18:49:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9696 states, 9694 states have (on average 1.126263668248401) internal successors, (10918), 9695 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9696 states to 9696 states and 10918 transitions. [2021-12-06 18:49:42,415 INFO L78 Accepts]: Start accepts. Automaton has 9696 states and 10918 transitions. Word has length 176 [2021-12-06 18:49:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:42,415 INFO L470 AbstractCegarLoop]: Abstraction has 9696 states and 10918 transitions. [2021-12-06 18:49:42,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 4.378640776699029) internal successors, (451), 103 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 9696 states and 10918 transitions. [2021-12-06 18:49:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 18:49:42,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:42,419 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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 18:49:42,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 18:49:42,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:42,620 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:49:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1393554368, now seen corresponding path program 18 times [2021-12-06 18:49:42,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:42,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196380138] [2021-12-06 18:49:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:42,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 19 proven. 729 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:43,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:43,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196380138] [2021-12-06 18:49:43,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196380138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:43,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374515906] [2021-12-06 18:49:43,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:49:43,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:43,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:43,227 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:43,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 18:49:43,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 18:49:43,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 18:49:43,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:43,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:49:44,078 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 18:49:44,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:49:46,462 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 18:49:46,462 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 18:49:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 19 proven. 729 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:48,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3713 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) v_ArrVal_3713))) (let ((.cse0 (select .cse1 |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| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) .cse0)))))) is different from false [2021-12-06 18:49:48,252 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-12-06 18:49:48,252 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 172 [2021-12-06 18:49:48,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:49:48,258 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 172 treesize of output 166 [2021-12-06 18:49:48,401 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-12-06 18:49:48,402 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 66 treesize of output 60 [2021-12-06 18:49:48,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:49:48,467 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 121 treesize of output 136 [2021-12-06 18:49:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 19 proven. 729 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:49,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374515906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:49,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:49,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 34] total 92 [2021-12-06 18:49:49,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390641146] [2021-12-06 18:49:49,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:49,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 18:49:49,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 18:49:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=7928, Unknown=1, NotChecked=178, Total=8372 [2021-12-06 18:49:49,456 INFO L87 Difference]: Start difference. First operand 9696 states and 10918 transitions. Second operand has 92 states, 92 states have (on average 5.608695652173913) internal successors, (516), 92 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:53,414 INFO L93 Difference]: Finished difference Result 15413 states and 17324 transitions. [2021-12-06 18:49:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:49:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 5.608695652173913) internal successors, (516), 92 states have internal predecessors, (516), 0 states have call successors, (0), 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 182 [2021-12-06 18:49:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:53,423 INFO L225 Difference]: With dead ends: 15413 [2021-12-06 18:49:53,423 INFO L226 Difference]: Without dead ends: 15255 [2021-12-06 18:49:53,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 309 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=528, Invalid=15987, Unknown=1, NotChecked=254, Total=16770 [2021-12-06 18:49:53,424 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 312 mSDsluCounter, 6703 mSDsCounter, 0 mSdLazyCounter, 2997 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 6831 SdHoareTripleChecker+Invalid, 4337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1322 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:53,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 6831 Invalid, 4337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2997 Invalid, 0 Unknown, 1322 Unchecked, 1.0s Time] [2021-12-06 18:49:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15255 states. [2021-12-06 18:49:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15255 to 15245. [2021-12-06 18:49:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15245 states, 15243 states have (on average 1.1259594567998426) internal successors, (17163), 15244 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15245 states to 15245 states and 17163 transitions. [2021-12-06 18:49:53,533 INFO L78 Accepts]: Start accepts. Automaton has 15245 states and 17163 transitions. Word has length 182 [2021-12-06 18:49:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:53,534 INFO L470 AbstractCegarLoop]: Abstraction has 15245 states and 17163 transitions. [2021-12-06 18:49:53,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 5.608695652173913) internal successors, (516), 92 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 15245 states and 17163 transitions. [2021-12-06 18:49:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-06 18:49:53,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:53,540 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:49:53,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-06 18:49:53,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-06 18:49:53,741 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:49:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash 653430917, now seen corresponding path program 27 times [2021-12-06 18:49:53,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:53,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720215672] [2021-12-06 18:49:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:53,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:54,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:54,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720215672] [2021-12-06 18:49:54,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720215672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:54,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710172845] [2021-12-06 18:49:54,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:49:54,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:54,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:54,380 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:54,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 18:49:55,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-06 18:49:55,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-06 18:49:55,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:55,746 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 18:49:56,081 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 18:49:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:56,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:56,286 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 18:49:56,287 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 18:49:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:49:56,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710172845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:56,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:56,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 70 [2021-12-06 18:49:56,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881482784] [2021-12-06 18:49:56,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:56,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 18:49:56,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 18:49:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4628, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 18:49:56,483 INFO L87 Difference]: Start difference. First operand 15245 states and 17163 transitions. Second operand has 70 states, 70 states have (on average 4.114285714285714) internal successors, (288), 70 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 18:50:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:01,244 INFO L93 Difference]: Finished difference Result 28229 states and 31727 transitions. [2021-12-06 18:50:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 18:50:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.114285714285714) internal successors, (288), 70 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 186 [2021-12-06 18:50:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:01,266 INFO L225 Difference]: With dead ends: 28229 [2021-12-06 18:50:01,266 INFO L226 Difference]: Without dead ends: 28066 [2021-12-06 18:50:01,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=684, Invalid=11088, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 18:50:01,267 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 1284 mSDsluCounter, 16301 mSDsCounter, 0 mSdLazyCounter, 11659 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 16698 SdHoareTripleChecker+Invalid, 11909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 11659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:01,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 16698 Invalid, 11909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 11659 Invalid, 0 Unknown, 184 Unchecked, 3.3s Time] [2021-12-06 18:50:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28066 states. [2021-12-06 18:50:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28066 to 17712. [2021-12-06 18:50:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17712 states, 17710 states have (on average 1.1285714285714286) internal successors, (19987), 17711 states have internal predecessors, (19987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17712 states to 17712 states and 19987 transitions. [2021-12-06 18:50:01,476 INFO L78 Accepts]: Start accepts. Automaton has 17712 states and 19987 transitions. Word has length 186 [2021-12-06 18:50:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:01,476 INFO L470 AbstractCegarLoop]: Abstraction has 17712 states and 19987 transitions. [2021-12-06 18:50:01,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.114285714285714) internal successors, (288), 70 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 18:50:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 17712 states and 19987 transitions. [2021-12-06 18:50:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-06 18:50:01,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:01,482 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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 18:50:01,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 18:50:01,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:01,684 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:50:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash -81965155, now seen corresponding path program 19 times [2021-12-06 18:50:01,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:01,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264602069] [2021-12-06 18:50:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:01,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 120 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:02,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264602069] [2021-12-06 18:50:02,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264602069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253991589] [2021-12-06 18:50:02,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:50:02,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:02,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:02,003 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:02,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 18:50:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:50:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:02,181 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 18:50:02,183 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 18:50:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 153 proven. 632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:03,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 190 proven. 595 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:04,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253991589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:04,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:04,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2021-12-06 18:50:04,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56421896] [2021-12-06 18:50:04,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:04,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 18:50:04,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 18:50:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=4344, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 18:50:04,287 INFO L87 Difference]: Start difference. First operand 17712 states and 19987 transitions. Second operand has 70 states, 69 states have (on average 7.811594202898551) internal successors, (539), 70 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:06,636 INFO L93 Difference]: Finished difference Result 30808 states and 34748 transitions. [2021-12-06 18:50:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:50:06,637 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 7.811594202898551) internal successors, (539), 70 states have internal predecessors, (539), 0 states have call successors, (0), 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 186 [2021-12-06 18:50:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:06,658 INFO L225 Difference]: With dead ends: 30808 [2021-12-06 18:50:06,658 INFO L226 Difference]: Without dead ends: 30808 [2021-12-06 18:50:06,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2315 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2184, Invalid=9806, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 18:50:06,659 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1346 mSDsluCounter, 3108 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:06,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 3261 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 18:50:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30808 states. [2021-12-06 18:50:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30808 to 18545. [2021-12-06 18:50:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18545 states, 18543 states have (on average 1.1286738931133042) internal successors, (20929), 18544 states have internal predecessors, (20929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18545 states to 18545 states and 20929 transitions. [2021-12-06 18:50:06,879 INFO L78 Accepts]: Start accepts. Automaton has 18545 states and 20929 transitions. Word has length 186 [2021-12-06 18:50:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:06,880 INFO L470 AbstractCegarLoop]: Abstraction has 18545 states and 20929 transitions. [2021-12-06 18:50:06,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 7.811594202898551) internal successors, (539), 70 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18545 states and 20929 transitions. [2021-12-06 18:50:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 18:50:06,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:06,887 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:06,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-06 18:50:07,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:07,087 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:50:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2009775582, now seen corresponding path program 28 times [2021-12-06 18:50:07,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:07,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070481887] [2021-12-06 18:50:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:07,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 435 proven. 959 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:07,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:07,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070481887] [2021-12-06 18:50:07,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070481887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:07,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43661299] [2021-12-06 18:50:07,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:50:07,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:07,745 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:07,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 18:50:07,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:50:07,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:50:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 18:50:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:07,912 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:50:07,913 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 18:50:08,239 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 18:50:09,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:50:09,573 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 19 treesize of output 19 [2021-12-06 18:50:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 512 proven. 882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:09,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:11,684 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 18:50:11,687 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 18:50:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 561 proven. 833 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:14,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43661299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:14,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:14,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 44, 44] total 109 [2021-12-06 18:50:14,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307704233] [2021-12-06 18:50:14,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:14,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 18:50:14,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 18:50:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=10763, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 18:50:14,420 INFO L87 Difference]: Start difference. First operand 18545 states and 20929 transitions. Second operand has 110 states, 109 states have (on average 4.5504587155963305) internal successors, (496), 110 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:26,313 INFO L93 Difference]: Finished difference Result 33867 states and 37800 transitions. [2021-12-06 18:50:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 18:50:26,314 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 4.5504587155963305) internal successors, (496), 110 states have internal predecessors, (496), 0 states have call successors, (0), 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 18:50:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:26,333 INFO L225 Difference]: With dead ends: 33867 [2021-12-06 18:50:26,334 INFO L226 Difference]: Without dead ends: 33763 [2021-12-06 18:50:26,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5637 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=7531, Invalid=30689, Unknown=0, NotChecked=0, Total=38220 [2021-12-06 18:50:26,335 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 3813 mSDsluCounter, 8437 mSDsCounter, 0 mSdLazyCounter, 13710 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3813 SdHoareTripleChecker+Valid, 8682 SdHoareTripleChecker+Invalid, 14403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 13710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:26,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3813 Valid, 8682 Invalid, 14403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 13710 Invalid, 0 Unknown, 327 Unchecked, 5.2s Time] [2021-12-06 18:50:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33763 states. [2021-12-06 18:50:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33763 to 21369. [2021-12-06 18:50:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21369 states, 21367 states have (on average 1.1330088454158282) internal successors, (24209), 21368 states have internal predecessors, (24209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21369 states to 21369 states and 24209 transitions. [2021-12-06 18:50:26,546 INFO L78 Accepts]: Start accepts. Automaton has 21369 states and 24209 transitions. Word has length 190 [2021-12-06 18:50:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:26,546 INFO L470 AbstractCegarLoop]: Abstraction has 21369 states and 24209 transitions. [2021-12-06 18:50:26,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 4.5504587155963305) internal successors, (496), 110 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21369 states and 24209 transitions. [2021-12-06 18:50:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-06 18:50:26,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:26,556 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 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 18:50:26,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-06 18:50:26,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:26,756 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:50:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2133573687, now seen corresponding path program 11 times [2021-12-06 18:50:26,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:26,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861760706] [2021-12-06 18:50:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:26,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 163 proven. 639 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:50:27,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861760706] [2021-12-06 18:50:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861760706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254111962] [2021-12-06 18:50:27,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:50:27,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:27,172 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:27,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 18:50:27,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 18:50:27,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:50:27,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 18:50:27,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:27,408 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 18:50:27,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:50:27,796 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 18:50:28,064 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 18:50:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 163 proven. 639 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:50:28,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:28,275 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4028) |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 18:50:28,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:50:28,279 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 18:50:28,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:50:28,283 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 18:50:28,285 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 18:50:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 163 proven. 639 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:50:28,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254111962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:28,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:28,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 46 [2021-12-06 18:50:28,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538773201] [2021-12-06 18:50:28,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:28,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:50:28,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:50:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1857, Unknown=1, NotChecked=86, Total=2070 [2021-12-06 18:50:28,547 INFO L87 Difference]: Start difference. First operand 21369 states and 24209 transitions. Second operand has 46 states, 46 states have (on average 5.739130434782608) internal successors, (264), 46 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:29,801 INFO L93 Difference]: Finished difference Result 27841 states and 31547 transitions. [2021-12-06 18:50:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 18:50:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.739130434782608) internal successors, (264), 46 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-12-06 18:50:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:29,816 INFO L225 Difference]: With dead ends: 27841 [2021-12-06 18:50:29,816 INFO L226 Difference]: Without dead ends: 18592 [2021-12-06 18:50:29,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 362 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=3099, Unknown=1, NotChecked=112, Total=3422 [2021-12-06 18:50:29,816 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 227 mSDsluCounter, 3519 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 3661 SdHoareTripleChecker+Invalid, 3222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:29,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 3661 Invalid, 3222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2854 Invalid, 0 Unknown, 356 Unchecked, 0.8s Time] [2021-12-06 18:50:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18592 states. [2021-12-06 18:50:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18592 to 14779. [2021-12-06 18:50:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 14777 states have (on average 1.1342627055559316) internal successors, (16761), 14778 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 16761 transitions. [2021-12-06 18:50:29,961 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 16761 transitions. Word has length 192 [2021-12-06 18:50:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:29,961 INFO L470 AbstractCegarLoop]: Abstraction has 14779 states and 16761 transitions. [2021-12-06 18:50:29,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.739130434782608) internal successors, (264), 46 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 16761 transitions. [2021-12-06 18:50:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-06 18:50:29,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:29,967 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 15, 15, 15, 15, 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 18:50:29,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-06 18:50:30,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:30,168 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:50:30,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1582360968, now seen corresponding path program 16 times [2021-12-06 18:50:30,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:30,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220268634] [2021-12-06 18:50:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:30,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 65 proven. 1205 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:50:30,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:30,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220268634] [2021-12-06 18:50:30,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220268634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:30,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160717459] [2021-12-06 18:50:30,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:50:30,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:30,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:30,803 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:30,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 18:50:30,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:50:30,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:50:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 18:50:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:30,983 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:50:30,983 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 18:50:31,867 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 13 treesize of output 9 [2021-12-06 18:50:33,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:50:33,632 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 18:50:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 710 proven. 560 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:50:33,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:35,123 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 18:50:35,125 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 18:50:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 681 proven. 589 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:50:36,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160717459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:36,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:36,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 115 [2021-12-06 18:50:36,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654880103] [2021-12-06 18:50:36,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:36,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-06 18:50:36,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-06 18:50:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1108, Invalid=12002, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 18:50:36,867 INFO L87 Difference]: Start difference. First operand 14779 states and 16761 transitions. Second operand has 115 states, 115 states have (on average 4.730434782608696) internal successors, (544), 115 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:41,016 INFO L93 Difference]: Finished difference Result 23940 states and 26977 transitions. [2021-12-06 18:50:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 18:50:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 4.730434782608696) internal successors, (544), 115 states have internal predecessors, (544), 0 states have call successors, (0), 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 18:50:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:41,031 INFO L225 Difference]: With dead ends: 23940 [2021-12-06 18:50:41,032 INFO L226 Difference]: Without dead ends: 23789 [2021-12-06 18:50:41,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9174 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3046, Invalid=30626, Unknown=0, NotChecked=0, Total=33672 [2021-12-06 18:50:41,033 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 592 mSDsluCounter, 4507 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 4623 SdHoareTripleChecker+Invalid, 4396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:41,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 4623 Invalid, 4396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3806 Invalid, 0 Unknown, 481 Unchecked, 1.1s Time] [2021-12-06 18:50:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23789 states. [2021-12-06 18:50:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23789 to 15774. [2021-12-06 18:50:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15774 states, 15772 states have (on average 1.134669033730662) internal successors, (17896), 15773 states have internal predecessors, (17896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15774 states to 15774 states and 17896 transitions. [2021-12-06 18:50:41,191 INFO L78 Accepts]: Start accepts. Automaton has 15774 states and 17896 transitions. Word has length 193 [2021-12-06 18:50:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:41,191 INFO L470 AbstractCegarLoop]: Abstraction has 15774 states and 17896 transitions. [2021-12-06 18:50:41,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 4.730434782608696) internal successors, (544), 115 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 15774 states and 17896 transitions. [2021-12-06 18:50:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 18:50:41,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:41,211 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 15, 15, 15, 15, 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 18:50:41,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 18:50:41,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-12-06 18:50:41,412 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:50:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:41,413 INFO L85 PathProgramCache]: Analyzing trace with hash 108199732, now seen corresponding path program 17 times [2021-12-06 18:50:41,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943287285] [2021-12-06 18:50:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:41,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 69 proven. 1298 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:50:42,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943287285] [2021-12-06 18:50:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943287285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951851356] [2021-12-06 18:50:42,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:50:42,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:42,031 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:42,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 18:50:42,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-06 18:50:42,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:50:42,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 18:50:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:42,456 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:50:42,456 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 18:50:43,305 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 18:50:44,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:50:44,863 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 18:50:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 378 proven. 989 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:50:45,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:46,950 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 18:50:46,952 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 18:50:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 435 proven. 932 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:50:48,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951851356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:48,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:48,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 119 [2021-12-06 18:50:48,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134085949] [2021-12-06 18:50:48,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:48,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 18:50:48,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:48,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 18:50:48,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=13123, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 18:50:48,657 INFO L87 Difference]: Start difference. First operand 15774 states and 17896 transitions. Second operand has 119 states, 119 states have (on average 4.697478991596639) internal successors, (559), 119 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:58,570 INFO L93 Difference]: Finished difference Result 18306 states and 20612 transitions. [2021-12-06 18:50:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 18:50:58,571 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 4.697478991596639) internal successors, (559), 119 states have internal predecessors, (559), 0 states have call successors, (0), 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 199 [2021-12-06 18:50:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:58,580 INFO L225 Difference]: With dead ends: 18306 [2021-12-06 18:50:58,581 INFO L226 Difference]: Without dead ends: 16561 [2021-12-06 18:50:58,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3113, Invalid=39943, Unknown=0, NotChecked=0, Total=43056 [2021-12-06 18:50:58,583 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 2907 mSDsluCounter, 10409 mSDsCounter, 0 mSdLazyCounter, 13579 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2907 SdHoareTripleChecker+Valid, 10625 SdHoareTripleChecker+Invalid, 14388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 13579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:58,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2907 Valid, 10625 Invalid, 14388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 13579 Invalid, 0 Unknown, 616 Unchecked, 4.5s Time] [2021-12-06 18:50:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16561 states. [2021-12-06 18:50:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16561 to 13198. [2021-12-06 18:50:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13198 states, 13196 states have (on average 1.1299636253410124) internal successors, (14911), 13197 states have internal predecessors, (14911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13198 states to 13198 states and 14911 transitions. [2021-12-06 18:50:58,718 INFO L78 Accepts]: Start accepts. Automaton has 13198 states and 14911 transitions. Word has length 199 [2021-12-06 18:50:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:58,718 INFO L470 AbstractCegarLoop]: Abstraction has 13198 states and 14911 transitions. [2021-12-06 18:50:58,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 4.697478991596639) internal successors, (559), 119 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 13198 states and 14911 transitions. [2021-12-06 18:50:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 18:50:58,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:58,724 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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 18:50:58,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-12-06 18:50:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:58,925 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:50:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1353764976, now seen corresponding path program 20 times [2021-12-06 18:50:58,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:58,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984678399] [2021-12-06 18:50:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:58,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 21 proven. 895 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:59,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:59,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984678399] [2021-12-06 18:50:59,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984678399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:59,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995374011] [2021-12-06 18:50:59,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:50:59,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:59,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:59,599 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:59,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-06 18:50:59,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:50:59,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:50:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-06 18:50:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:59,810 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 10 treesize of output 8 [2021-12-06 18:51:00,384 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 18:51:00,451 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 18:51:03,902 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-06 18:51:03,902 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 48 treesize of output 20 [2021-12-06 18:51:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 21 proven. 895 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:03,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:04,579 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4275 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4275) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse0 (select v_ArrVal_4275 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse0 .cse1)) (= .cse1 0) (not (= .cse0 (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)))))))) is different from false [2021-12-06 18:51:04,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:51:04,584 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 72 treesize of output 50 [2021-12-06 18:51:04,596 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-06 18:51:04,596 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 93 treesize of output 88 [2021-12-06 18:51:04,609 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-06 18:51:04,609 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 60 treesize of output 62 [2021-12-06 18:51:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 33 proven. 883 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:05,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995374011] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:05,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:05,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 94 [2021-12-06 18:51:05,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568488312] [2021-12-06 18:51:05,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:05,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 18:51:05,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 18:51:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=8265, Unknown=1, NotChecked=182, Total=8742 [2021-12-06 18:51:05,709 INFO L87 Difference]: Start difference. First operand 13198 states and 14911 transitions. Second operand has 94 states, 94 states have (on average 4.9787234042553195) internal successors, (468), 94 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:08,648 INFO L93 Difference]: Finished difference Result 27940 states and 31530 transitions. [2021-12-06 18:51:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 18:51:08,649 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 4.9787234042553195) internal successors, (468), 94 states have internal predecessors, (468), 0 states have call successors, (0), 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 199 [2021-12-06 18:51:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:08,669 INFO L225 Difference]: With dead ends: 27940 [2021-12-06 18:51:08,670 INFO L226 Difference]: Without dead ends: 27741 [2021-12-06 18:51:08,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=566, Invalid=16207, Unknown=1, NotChecked=256, Total=17030 [2021-12-06 18:51:08,671 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 302 mSDsluCounter, 7973 mSDsCounter, 0 mSdLazyCounter, 3446 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 8114 SdHoareTripleChecker+Invalid, 6395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2929 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:08,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 8114 Invalid, 6395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3446 Invalid, 0 Unknown, 2929 Unchecked, 1.1s Time] [2021-12-06 18:51:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27741 states. [2021-12-06 18:51:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27741 to 26785. [2021-12-06 18:51:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26785 states, 26783 states have (on average 1.1307545831310906) internal successors, (30285), 26784 states have internal predecessors, (30285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 30285 transitions. [2021-12-06 18:51:08,894 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 30285 transitions. Word has length 199 [2021-12-06 18:51:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:08,894 INFO L470 AbstractCegarLoop]: Abstraction has 26785 states and 30285 transitions. [2021-12-06 18:51:08,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 4.9787234042553195) internal successors, (468), 94 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 30285 transitions. [2021-12-06 18:51:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-06 18:51:08,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:08,905 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:08,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-06 18:51:09,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-12-06 18:51:09,106 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:51:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1261185206, now seen corresponding path program 29 times [2021-12-06 18:51:09,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:09,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121704791] [2021-12-06 18:51:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:09,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 942 proven. 664 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:09,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121704791] [2021-12-06 18:51:09,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121704791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206925076] [2021-12-06 18:51:09,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:51:09,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:09,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:09,743 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:09,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-06 18:51:10,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-06 18:51:10,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:51:10,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 18:51:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:10,092 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:51:10,092 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 18:51:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 1045 proven. 561 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:11,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 1045 proven. 561 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:12,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206925076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:12,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:12,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 104 [2021-12-06 18:51:12,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529461895] [2021-12-06 18:51:12,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:12,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 18:51:12,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 18:51:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1663, Invalid=9049, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 18:51:12,692 INFO L87 Difference]: Start difference. First operand 26785 states and 30285 transitions. Second operand has 104 states, 104 states have (on average 4.644230769230769) internal successors, (483), 104 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 18:51:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:25,820 INFO L93 Difference]: Finished difference Result 59976 states and 65282 transitions. [2021-12-06 18:51:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-12-06 18:51:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.644230769230769) internal successors, (483), 104 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 202 [2021-12-06 18:51:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:25,862 INFO L225 Difference]: With dead ends: 59976 [2021-12-06 18:51:25,862 INFO L226 Difference]: Without dead ends: 55711 [2021-12-06 18:51:25,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31285 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=21155, Invalid=79651, Unknown=0, NotChecked=0, Total=100806 [2021-12-06 18:51:25,867 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 4328 mSDsluCounter, 4937 mSDsCounter, 0 mSdLazyCounter, 6086 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4328 SdHoareTripleChecker+Valid, 5169 SdHoareTripleChecker+Invalid, 6361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 6086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:25,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4328 Valid, 5169 Invalid, 6361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 6086 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 18:51:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55711 states. [2021-12-06 18:51:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55711 to 27320. [2021-12-06 18:51:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27320 states, 27318 states have (on average 1.1302071893989312) internal successors, (30875), 27319 states have internal predecessors, (30875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27320 states to 27320 states and 30875 transitions. [2021-12-06 18:51:26,212 INFO L78 Accepts]: Start accepts. Automaton has 27320 states and 30875 transitions. Word has length 202 [2021-12-06 18:51:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:26,212 INFO L470 AbstractCegarLoop]: Abstraction has 27320 states and 30875 transitions. [2021-12-06 18:51:26,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.644230769230769) internal successors, (483), 104 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 18:51:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 27320 states and 30875 transitions. [2021-12-06 18:51:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-06 18:51:26,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:26,222 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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 18:51:26,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-06 18:51:26,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-12-06 18:51:26,423 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:51:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2012180947, now seen corresponding path program 21 times [2021-12-06 18:51:26,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:26,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870619033] [2021-12-06 18:51:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:26,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 153 proven. 804 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:26,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870619033] [2021-12-06 18:51:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870619033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113762830] [2021-12-06 18:51:26,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:51:26,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:26,798 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:26,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-06 18:51:27,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 18:51:27,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:51:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 18:51:27,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:27,340 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 18:51:27,763 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 18:51:27,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:51:44,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:51:44,721 INFO L354 Elim1Store]: treesize reduction 2, result has 92.9 percent of original size [2021-12-06 18:51:44,721 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 33 treesize of output 39 [2021-12-06 18:51:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 190 proven. 767 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:44,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:49,141 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478| Int) (|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (v_ArrVal_4437 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4437))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (= .cse0 0) (<= (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478| 2) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478| 0) (< (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478|) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478|))))))) is different from false [2021-12-06 18:51:49,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:51:49,157 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 62 treesize of output 40 [2021-12-06 18:51:49,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:51:49,175 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 103 treesize of output 112 [2021-12-06 18:51:49,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:51:49,187 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 64 treesize of output 62 [2021-12-06 18:51:49,193 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 18:51:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 190 proven. 767 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:51:50,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113762830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:50,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:50,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 35, 34] total 93 [2021-12-06 18:51:50,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516125545] [2021-12-06 18:51:50,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:50,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 18:51:50,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 18:51:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=7602, Unknown=1, NotChecked=182, Total=8742 [2021-12-06 18:51:50,099 INFO L87 Difference]: Start difference. First operand 27320 states and 30875 transitions. Second operand has 94 states, 93 states have (on average 6.462365591397849) internal successors, (601), 94 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:50,811 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)))) (and (forall ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478| Int) (|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (v_ArrVal_4437 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4437))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (= .cse0 0) (<= (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478| 2) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478| 0) (< (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478|) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_478|))))))) (or .cse2 (<= 12 |c_ULTIMATE.start_main_~length1~0#1|)) .cse2 (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 10 |c_ULTIMATE.start_main_~i~0#1|) (<= 11 |c_ULTIMATE.start_main_~length1~0#1|) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0))) is different from false [2021-12-06 18:52:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:48,852 INFO L93 Difference]: Finished difference Result 30687 states and 34482 transitions. [2021-12-06 18:52:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-12-06 18:52:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 6.462365591397849) internal successors, (601), 94 states have internal predecessors, (601), 0 states have call successors, (0), 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 203 [2021-12-06 18:52:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:48,875 INFO L225 Difference]: With dead ends: 30687 [2021-12-06 18:52:48,875 INFO L226 Difference]: Without dead ends: 30687 [2021-12-06 18:52:48,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 24464 ImplicationChecksByTransitivity, 75.1s TimeCoverageRelationStatistics Valid=9527, Invalid=62032, Unknown=5, NotChecked=1066, Total=72630 [2021-12-06 18:52:48,878 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 405 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 804 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:48,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1630 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 908 Invalid, 0 Unknown, 804 Unchecked, 0.3s Time] [2021-12-06 18:52:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30687 states. [2021-12-06 18:52:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30687 to 29283. [2021-12-06 18:52:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29283 states, 29281 states have (on average 1.126566715617636) internal successors, (32987), 29282 states have internal predecessors, (32987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29283 states to 29283 states and 32987 transitions. [2021-12-06 18:52:49,121 INFO L78 Accepts]: Start accepts. Automaton has 29283 states and 32987 transitions. Word has length 203 [2021-12-06 18:52:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:49,122 INFO L470 AbstractCegarLoop]: Abstraction has 29283 states and 32987 transitions. [2021-12-06 18:52:49,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 6.462365591397849) internal successors, (601), 94 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29283 states and 32987 transitions. [2021-12-06 18:52:49,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-06 18:52:49,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:49,133 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:49,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-12-06 18:52:49,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:49,334 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:52:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1019326183, now seen corresponding path program 30 times [2021-12-06 18:52:49,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:49,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995621654] [2021-12-06 18:52:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:49,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:52:50,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995621654] [2021-12-06 18:52:50,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995621654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579720443] [2021-12-06 18:52:50,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:52:50,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:50,060 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:50,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-06 18:52:51,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-12-06 18:52:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 18:52:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:52,264 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 18:52:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:52:52,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:52,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 18:52:52,986 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 18:52:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:52:53,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579720443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:53,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:53,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 78 [2021-12-06 18:52:53,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294551163] [2021-12-06 18:52:53,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:53,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 18:52:53,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 18:52:53,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=5780, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:52:53,221 INFO L87 Difference]: Start difference. First operand 29283 states and 32987 transitions. Second operand has 78 states, 78 states have (on average 4.089743589743589) internal successors, (319), 78 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:59,849 INFO L93 Difference]: Finished difference Result 44316 states and 49643 transitions. [2021-12-06 18:52:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 18:52:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.089743589743589) internal successors, (319), 78 states have internal predecessors, (319), 0 states have call successors, (0), 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 206 [2021-12-06 18:52:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:59,878 INFO L225 Difference]: With dead ends: 44316 [2021-12-06 18:52:59,878 INFO L226 Difference]: Without dead ends: 42456 [2021-12-06 18:52:59,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 378 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=837, Invalid=13683, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 18:52:59,879 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 2057 mSDsluCounter, 20054 mSDsCounter, 0 mSdLazyCounter, 15823 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2057 SdHoareTripleChecker+Valid, 20483 SdHoareTripleChecker+Invalid, 16176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 15823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:59,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2057 Valid, 20483 Invalid, 16176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 15823 Invalid, 0 Unknown, 187 Unchecked, 4.7s Time] [2021-12-06 18:52:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42456 states. [2021-12-06 18:53:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42456 to 29327. [2021-12-06 18:53:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29327 states, 29325 states have (on average 1.1264450127877237) internal successors, (33033), 29326 states have internal predecessors, (33033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29327 states to 29327 states and 33033 transitions. [2021-12-06 18:53:00,174 INFO L78 Accepts]: Start accepts. Automaton has 29327 states and 33033 transitions. Word has length 206 [2021-12-06 18:53:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:00,174 INFO L470 AbstractCegarLoop]: Abstraction has 29327 states and 33033 transitions. [2021-12-06 18:53:00,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.089743589743589) internal successors, (319), 78 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 29327 states and 33033 transitions. [2021-12-06 18:53:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-06 18:53:00,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:00,186 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 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 18:53:00,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-06 18:53:00,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-12-06 18:53:00,387 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:53:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1989758977, now seen corresponding path program 12 times [2021-12-06 18:53:00,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:00,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449858320] [2021-12-06 18:53:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:00,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 181 proven. 795 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:53:00,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449858320] [2021-12-06 18:53:00,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449858320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948093606] [2021-12-06 18:53:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:53:00,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:00,848 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:00,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-06 18:53:01,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 18:53:01,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 18:53:01,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:01,284 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 18:53:01,727 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 18:53:01,775 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 18:53:02,376 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:53:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 18:53:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 26 proven. 955 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:53:02,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:02,957 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4603 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4603) |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 18:53:02,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:53:02,961 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 18:53:02,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:53:02,965 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 18:53:02,967 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 18:53:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 21 proven. 960 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:53:03,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948093606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:03,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:03,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34, 34] total 61 [2021-12-06 18:53:03,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807077565] [2021-12-06 18:53:03,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:03,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 18:53:03,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 18:53:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3369, Unknown=1, NotChecked=116, Total=3660 [2021-12-06 18:53:03,227 INFO L87 Difference]: Start difference. First operand 29327 states and 33033 transitions. Second operand has 61 states, 61 states have (on average 5.229508196721311) internal successors, (319), 61 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:05,913 INFO L93 Difference]: Finished difference Result 41766 states and 47102 transitions. [2021-12-06 18:53:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:53:05,914 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.229508196721311) internal successors, (319), 61 states have internal predecessors, (319), 0 states have call successors, (0), 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 18:53:05,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:05,928 INFO L225 Difference]: With dead ends: 41766 [2021-12-06 18:53:05,929 INFO L226 Difference]: Without dead ends: 22101 [2021-12-06 18:53:05,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 383 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=379, Invalid=6596, Unknown=1, NotChecked=164, Total=7140 [2021-12-06 18:53:05,929 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 876 mSDsluCounter, 9572 mSDsCounter, 0 mSdLazyCounter, 5802 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 7314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1466 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:05,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 9859 Invalid, 7314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5802 Invalid, 0 Unknown, 1466 Unchecked, 1.8s Time] [2021-12-06 18:53:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22101 states. [2021-12-06 18:53:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22101 to 14882. [2021-12-06 18:53:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14882 states, 14880 states have (on average 1.1206317204301075) internal successors, (16675), 14881 states have internal predecessors, (16675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14882 states to 14882 states and 16675 transitions. [2021-12-06 18:53:06,086 INFO L78 Accepts]: Start accepts. Automaton has 14882 states and 16675 transitions. Word has length 209 [2021-12-06 18:53:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:06,086 INFO L470 AbstractCegarLoop]: Abstraction has 14882 states and 16675 transitions. [2021-12-06 18:53:06,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.229508196721311) internal successors, (319), 61 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14882 states and 16675 transitions. [2021-12-06 18:53:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 18:53:06,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:06,092 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:06,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-12-06 18:53:06,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:06,293 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:53:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash -460296188, now seen corresponding path program 31 times [2021-12-06 18:53:06,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:06,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352867531] [2021-12-06 18:53:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:06,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 561 proven. 1187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:07,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:07,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352867531] [2021-12-06 18:53:07,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352867531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:07,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370163803] [2021-12-06 18:53:07,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:53:07,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:07,103 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:07,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-06 18:53:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-06 18:53:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 630 proven. 1118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:08,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:09,471 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 18:53:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 630 proven. 1118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370163803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:09,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:09,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 90 [2021-12-06 18:53:09,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761592136] [2021-12-06 18:53:09,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:09,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 18:53:09,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 18:53:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=7441, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 18:53:09,575 INFO L87 Difference]: Start difference. First operand 14882 states and 16675 transitions. Second operand has 91 states, 90 states have (on average 4.7555555555555555) internal successors, (428), 91 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:16,449 INFO L93 Difference]: Finished difference Result 21846 states and 24306 transitions. [2021-12-06 18:53:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 18:53:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 4.7555555555555555) internal successors, (428), 91 states have internal predecessors, (428), 0 states have call successors, (0), 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 210 [2021-12-06 18:53:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:16,462 INFO L225 Difference]: With dead ends: 21846 [2021-12-06 18:53:16,462 INFO L226 Difference]: Without dead ends: 21846 [2021-12-06 18:53:16,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 370 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3325 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4239, Invalid=18111, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 18:53:16,463 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 2520 mSDsluCounter, 7738 mSDsCounter, 0 mSdLazyCounter, 12167 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2520 SdHoareTripleChecker+Valid, 7964 SdHoareTripleChecker+Invalid, 12331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 12167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:16,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2520 Valid, 7964 Invalid, 12331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 12167 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-06 18:53:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21846 states. [2021-12-06 18:53:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21846 to 15008. [2021-12-06 18:53:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15008 states, 15006 states have (on average 1.120951619352259) internal successors, (16821), 15007 states have internal predecessors, (16821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15008 states to 15008 states and 16821 transitions. [2021-12-06 18:53:16,636 INFO L78 Accepts]: Start accepts. Automaton has 15008 states and 16821 transitions. Word has length 210 [2021-12-06 18:53:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:16,636 INFO L470 AbstractCegarLoop]: Abstraction has 15008 states and 16821 transitions. [2021-12-06 18:53:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 4.7555555555555555) internal successors, (428), 91 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 15008 states and 16821 transitions. [2021-12-06 18:53:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-06 18:53:16,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:16,643 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:16,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-12-06 18:53:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-06 18:53:16,844 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:53:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash -134792574, now seen corresponding path program 13 times [2021-12-06 18:53:16,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:16,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144871442] [2021-12-06 18:53:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:16,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 153 proven. 864 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:53:17,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144871442] [2021-12-06 18:53:17,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144871442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715625201] [2021-12-06 18:53:17,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:53:17,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:17,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:17,203 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:17,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-06 18:53:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:17,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 18:53:17,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 190 proven. 827 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:53:18,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:18,733 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 18:53:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 190 proven. 827 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:53:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715625201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:18,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:18,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2021-12-06 18:53:18,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676491534] [2021-12-06 18:53:18,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 18:53:18,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 18:53:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2703, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:53:18,802 INFO L87 Difference]: Start difference. First operand 15008 states and 16821 transitions. Second operand has 56 states, 55 states have (on average 7.636363636363637) internal successors, (420), 56 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:20,632 INFO L93 Difference]: Finished difference Result 22655 states and 25463 transitions. [2021-12-06 18:53:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:53:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 7.636363636363637) internal successors, (420), 56 states have internal predecessors, (420), 0 states have call successors, (0), 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 213 [2021-12-06 18:53:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:20,646 INFO L225 Difference]: With dead ends: 22655 [2021-12-06 18:53:20,646 INFO L226 Difference]: Without dead ends: 22655 [2021-12-06 18:53:20,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1252, Invalid=5228, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:53:20,647 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 1173 mSDsluCounter, 3827 mSDsCounter, 0 mSdLazyCounter, 3713 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 3995 SdHoareTripleChecker+Invalid, 3784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:20,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 3995 Invalid, 3784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 18:53:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22655 states. [2021-12-06 18:53:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22655 to 15935. [2021-12-06 18:53:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15935 states, 15933 states have (on average 1.1218226322726417) internal successors, (17874), 15934 states have internal predecessors, (17874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15935 states to 15935 states and 17874 transitions. [2021-12-06 18:53:20,819 INFO L78 Accepts]: Start accepts. Automaton has 15935 states and 17874 transitions. Word has length 213 [2021-12-06 18:53:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:20,819 INFO L470 AbstractCegarLoop]: Abstraction has 15935 states and 17874 transitions. [2021-12-06 18:53:20,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 7.636363636363637) internal successors, (420), 56 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15935 states and 17874 transitions. [2021-12-06 18:53:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-06 18:53:20,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:20,826 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:20,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-12-06 18:53:21,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-06 18:53:21,027 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:53:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash -377112424, now seen corresponding path program 32 times [2021-12-06 18:53:21,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:21,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173257103] [2021-12-06 18:53:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:21,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:21,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:21,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173257103] [2021-12-06 18:53:21,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173257103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:21,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141640745] [2021-12-06 18:53:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:53:21,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:21,861 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:21,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-06 18:53:22,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:53:22,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:22,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-06 18:53:22,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:22,609 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:53:26,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:53:26,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:53:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 630 proven. 1233 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:26,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:29,103 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 18:53:29,106 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 26 treesize of output 22 [2021-12-06 18:53:29,109 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 35 treesize of output 27 [2021-12-06 18:53:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 630 proven. 1233 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:29,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141640745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:29,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:29,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 123 [2021-12-06 18:53:29,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839799789] [2021-12-06 18:53:29,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:29,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-12-06 18:53:29,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-12-06 18:53:29,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=14042, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 18:53:29,220 INFO L87 Difference]: Start difference. First operand 15935 states and 17874 transitions. Second operand has 123 states, 123 states have (on average 4.512195121951219) internal successors, (555), 123 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 18:53:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:40,139 INFO L93 Difference]: Finished difference Result 24574 states and 27559 transitions. [2021-12-06 18:53:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 18:53:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 4.512195121951219) internal successors, (555), 123 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) Word has length 216 [2021-12-06 18:53:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:40,154 INFO L225 Difference]: With dead ends: 24574 [2021-12-06 18:53:40,154 INFO L226 Difference]: Without dead ends: 24420 [2021-12-06 18:53:40,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 406 SyntacticMatches, 4 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7637 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1803, Invalid=27267, Unknown=0, NotChecked=0, Total=29070 [2021-12-06 18:53:40,156 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 2131 mSDsluCounter, 15471 mSDsCounter, 0 mSdLazyCounter, 15600 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2131 SdHoareTripleChecker+Valid, 15847 SdHoareTripleChecker+Invalid, 19346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 15600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3633 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:40,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2131 Valid, 15847 Invalid, 19346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 15600 Invalid, 0 Unknown, 3633 Unchecked, 5.3s Time] [2021-12-06 18:53:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24420 states. [2021-12-06 18:53:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24420 to 17291. [2021-12-06 18:53:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17291 states, 17289 states have (on average 1.1238359650644918) internal successors, (19430), 17290 states have internal predecessors, (19430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17291 states to 17291 states and 19430 transitions. [2021-12-06 18:53:40,353 INFO L78 Accepts]: Start accepts. Automaton has 17291 states and 19430 transitions. Word has length 216 [2021-12-06 18:53:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:40,353 INFO L470 AbstractCegarLoop]: Abstraction has 17291 states and 19430 transitions. [2021-12-06 18:53:40,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 4.512195121951219) internal successors, (555), 123 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 18:53:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 17291 states and 19430 transitions. [2021-12-06 18:53:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 18:53:40,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:40,361 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:40,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-12-06 18:53:40,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-06 18:53:40,562 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:53:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:40,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2011834697, now seen corresponding path program 33 times [2021-12-06 18:53:40,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:40,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104571111] [2021-12-06 18:53:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:40,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:41,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:41,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104571111] [2021-12-06 18:53:41,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104571111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:41,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33810737] [2021-12-06 18:53:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:53:41,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:41,463 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-06 18:53:43,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 18:53:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:43,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-06 18:53:43,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:44,268 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 18:53:44,668 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 18:53:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:44,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:44,925 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 18:53:44,926 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 18:53:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:45,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33810737] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:45,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:45,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 82 [2021-12-06 18:53:45,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991000601] [2021-12-06 18:53:45,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:45,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 18:53:45,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 18:53:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=6408, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 18:53:45,159 INFO L87 Difference]: Start difference. First operand 17291 states and 19430 transitions. Second operand has 82 states, 82 states have (on average 4.195121951219512) internal successors, (344), 82 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:52,294 INFO L93 Difference]: Finished difference Result 33786 states and 38007 transitions. [2021-12-06 18:53:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 18:53:52,295 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 4.195121951219512) internal successors, (344), 82 states have internal predecessors, (344), 0 states have call successors, (0), 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 226 [2021-12-06 18:53:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:52,323 INFO L225 Difference]: With dead ends: 33786 [2021-12-06 18:53:52,323 INFO L226 Difference]: Without dead ends: 33604 [2021-12-06 18:53:52,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 418 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=808, Invalid=15704, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 18:53:52,324 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 1234 mSDsluCounter, 24753 mSDsCounter, 0 mSdLazyCounter, 17063 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 25250 SdHoareTripleChecker+Invalid, 17946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 17063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 814 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:52,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 25250 Invalid, 17946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 17063 Invalid, 0 Unknown, 814 Unchecked, 5.0s Time] [2021-12-06 18:53:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33604 states. [2021-12-06 18:53:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33604 to 20029. [2021-12-06 18:53:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20029 states, 20027 states have (on average 1.1270285115094623) internal successors, (22571), 20028 states have internal predecessors, (22571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20029 states to 20029 states and 22571 transitions. [2021-12-06 18:53:52,569 INFO L78 Accepts]: Start accepts. Automaton has 20029 states and 22571 transitions. Word has length 226 [2021-12-06 18:53:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:52,569 INFO L470 AbstractCegarLoop]: Abstraction has 20029 states and 22571 transitions. [2021-12-06 18:53:52,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 4.195121951219512) internal successors, (344), 82 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:52,569 INFO L276 IsEmpty]: Start isEmpty. Operand 20029 states and 22571 transitions. [2021-12-06 18:53:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 18:53:52,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:52,579 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 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 18:53:52,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-12-06 18:53:52,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-12-06 18:53:52,780 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:53:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash 92825059, now seen corresponding path program 14 times [2021-12-06 18:53:52,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:52,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643407463] [2021-12-06 18:53:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:52,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 199 proven. 968 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:53:53,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:53,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643407463] [2021-12-06 18:53:53,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643407463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:53,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606927831] [2021-12-06 18:53:53,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:53:53,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:53,275 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:53,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-06 18:53:53,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:53:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 18:53:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:53,496 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 18:53:53,992 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 18:53:54,045 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 18:53:54,367 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 18:53:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 199 proven. 968 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:53:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:54,614 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5050 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5050) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0)) is different from false [2021-12-06 18:53:54,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:53:54,619 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 18:53:54,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:53:54,623 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 18:53:54,625 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 18:53:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 199 proven. 968 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:53:54,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606927831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:54,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:54,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 52 [2021-12-06 18:53:54,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805408740] [2021-12-06 18:53:54,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:54,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 18:53:54,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:54,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 18:53:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2413, Unknown=1, NotChecked=98, Total=2652 [2021-12-06 18:53:54,939 INFO L87 Difference]: Start difference. First operand 20029 states and 22571 transitions. Second operand has 52 states, 52 states have (on average 5.884615384615385) internal successors, (306), 52 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:57,000 INFO L93 Difference]: Finished difference Result 34165 states and 38455 transitions. [2021-12-06 18:53:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:53:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.884615384615385) internal successors, (306), 52 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-12-06 18:53:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:57,018 INFO L225 Difference]: With dead ends: 34165 [2021-12-06 18:53:57,019 INFO L226 Difference]: Without dead ends: 23097 [2021-12-06 18:53:57,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 428 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=4059, Unknown=1, NotChecked=128, Total=4422 [2021-12-06 18:53:57,019 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 232 mSDsluCounter, 5754 mSDsCounter, 0 mSdLazyCounter, 4603 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 5926 SdHoareTripleChecker+Invalid, 4996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 4603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:57,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 5926 Invalid, 4996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 4603 Invalid, 0 Unknown, 380 Unchecked, 1.5s Time] [2021-12-06 18:53:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23097 states. [2021-12-06 18:53:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23097 to 20521. [2021-12-06 18:53:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20521 states, 20519 states have (on average 1.127150445928164) internal successors, (23128), 20520 states have internal predecessors, (23128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20521 states to 20521 states and 23128 transitions. [2021-12-06 18:53:57,193 INFO L78 Accepts]: Start accepts. Automaton has 20521 states and 23128 transitions. Word has length 226 [2021-12-06 18:53:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:57,193 INFO L470 AbstractCegarLoop]: Abstraction has 20521 states and 23128 transitions. [2021-12-06 18:53:57,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.884615384615385) internal successors, (306), 52 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 20521 states and 23128 transitions. [2021-12-06 18:53:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 18:53:57,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:57,203 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:57,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-06 18:53:57,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:57,404 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:53:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:57,405 INFO L85 PathProgramCache]: Analyzing trace with hash -350078490, now seen corresponding path program 34 times [2021-12-06 18:53:57,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:57,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719523698] [2021-12-06 18:53:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:57,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2143 backedges. 703 proven. 1439 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:53:58,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:58,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719523698] [2021-12-06 18:53:58,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719523698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:58,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986806661] [2021-12-06 18:53:58,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:53:58,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:58,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:58,289 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:58,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-06 18:53:58,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:53:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-06 18:53:58,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:58,507 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:53:58,507 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 18:53:58,884 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 18:54:00,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:54:00,788 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 19 treesize of output 19 [2021-12-06 18:54:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2143 backedges. 800 proven. 1342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:54:01,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:03,681 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 18:54:03,683 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 18:54:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2143 backedges. 861 proven. 1281 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:54:07,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986806661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:54:07,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:54:07,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 52, 52] total 129 [2021-12-06 18:54:07,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921886884] [2021-12-06 18:54:07,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:54:07,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-12-06 18:54:07,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:07,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-12-06 18:54:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1705, Invalid=15065, Unknown=0, NotChecked=0, Total=16770 [2021-12-06 18:54:07,580 INFO L87 Difference]: Start difference. First operand 20521 states and 23128 transitions. Second operand has 130 states, 129 states have (on average 4.651162790697675) internal successors, (600), 130 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:24,630 INFO L93 Difference]: Finished difference Result 39582 states and 44257 transitions. [2021-12-06 18:54:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 18:54:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 4.651162790697675) internal successors, (600), 130 states have internal predecessors, (600), 0 states have call successors, (0), 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 230 [2021-12-06 18:54:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:24,657 INFO L225 Difference]: With dead ends: 39582 [2021-12-06 18:54:24,657 INFO L226 Difference]: Without dead ends: 39454 [2021-12-06 18:54:24,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7810 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=10539, Invalid=43053, Unknown=0, NotChecked=0, Total=53592 [2021-12-06 18:54:24,660 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 5481 mSDsluCounter, 11574 mSDsCounter, 0 mSdLazyCounter, 17836 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5481 SdHoareTripleChecker+Valid, 11877 SdHoareTripleChecker+Invalid, 18870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 17836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:24,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5481 Valid, 11877 Invalid, 18870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 17836 Invalid, 0 Unknown, 525 Unchecked, 7.4s Time] [2021-12-06 18:54:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39454 states. [2021-12-06 18:54:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39454 to 23541. [2021-12-06 18:54:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23541 states, 23539 states have (on average 1.131738816432304) internal successors, (26640), 23540 states have internal predecessors, (26640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23541 states to 23541 states and 26640 transitions. [2021-12-06 18:54:24,963 INFO L78 Accepts]: Start accepts. Automaton has 23541 states and 26640 transitions. Word has length 230 [2021-12-06 18:54:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:24,963 INFO L470 AbstractCegarLoop]: Abstraction has 23541 states and 26640 transitions. [2021-12-06 18:54:24,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 4.651162790697675) internal successors, (600), 130 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 23541 states and 26640 transitions. [2021-12-06 18:54:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 18:54:24,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:24,974 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:54:24,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-12-06 18:54:25,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:25,175 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:54:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:25,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1014771264, now seen corresponding path program 15 times [2021-12-06 18:54:25,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:25,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36340596] [2021-12-06 18:54:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:25,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 190 proven. 1022 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:54:25,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:25,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36340596] [2021-12-06 18:54:25,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36340596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:54:25,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203364342] [2021-12-06 18:54:25,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:54:25,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:25,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:54:25,545 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:54:25,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-06 18:54:26,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 18:54:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:54:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 18:54:26,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:54:26,146 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:54:26,146 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 18:54:27,119 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 15 treesize of output 11 [2021-12-06 18:54:29,930 INFO L354 Elim1Store]: treesize reduction 3, result has 93.3 percent of original size [2021-12-06 18:54:29,930 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 34 treesize of output 55 [2021-12-06 18:54:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 236 proven. 981 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:54:30,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:38,319 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-12-06 18:54:38,319 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 131 treesize of output 111 [2021-12-06 18:54:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 276 proven. 941 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:54:40,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203364342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:54:40,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:54:40,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 35, 35] total 96 [2021-12-06 18:54:40,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210781148] [2021-12-06 18:54:40,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:54:40,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 18:54:40,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 18:54:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=8380, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 18:54:40,587 INFO L87 Difference]: Start difference. First operand 23541 states and 26640 transitions. Second operand has 97 states, 96 states have (on average 6.927083333333333) internal successors, (665), 97 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:48,433 INFO L93 Difference]: Finished difference Result 33853 states and 38444 transitions. [2021-12-06 18:54:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-06 18:54:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 6.927083333333333) internal successors, (665), 97 states have internal predecessors, (665), 0 states have call successors, (0), 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 230 [2021-12-06 18:54:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:48,459 INFO L225 Difference]: With dead ends: 33853 [2021-12-06 18:54:48,459 INFO L226 Difference]: Without dead ends: 33853 [2021-12-06 18:54:48,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 406 SyntacticMatches, 32 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14588 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=4212, Invalid=38844, Unknown=0, NotChecked=0, Total=43056 [2021-12-06 18:54:48,462 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 332 mSDsluCounter, 2070 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:48,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 2149 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1428 Invalid, 0 Unknown, 300 Unchecked, 0.6s Time] [2021-12-06 18:54:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33853 states. [2021-12-06 18:54:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33853 to 23359. [2021-12-06 18:54:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23359 states, 23357 states have (on average 1.1321659459690885) internal successors, (26444), 23358 states have internal predecessors, (26444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23359 states to 23359 states and 26444 transitions. [2021-12-06 18:54:48,699 INFO L78 Accepts]: Start accepts. Automaton has 23359 states and 26444 transitions. Word has length 230 [2021-12-06 18:54:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:48,699 INFO L470 AbstractCegarLoop]: Abstraction has 23359 states and 26444 transitions. [2021-12-06 18:54:48,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 6.927083333333333) internal successors, (665), 97 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:48,700 INFO L276 IsEmpty]: Start isEmpty. Operand 23359 states and 26444 transitions. [2021-12-06 18:54:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 18:54:48,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:48,710 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:54:48,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-12-06 18:54:48,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-12-06 18:54:48,911 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:54:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1631433560, now seen corresponding path program 16 times [2021-12-06 18:54:48,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:48,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063404518] [2021-12-06 18:54:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:48,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 190 proven. 1022 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:54:49,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063404518] [2021-12-06 18:54:49,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063404518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:54:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982526442] [2021-12-06 18:54:49,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:54:49,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:54:49,310 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:54:49,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-06 18:54:49,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:54:49,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:54:49,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 18:54:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:54:49,521 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:54:49,521 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 18:54:50,521 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 18:54:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:54:50,585 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 18:54:56,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:54:56,045 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 18 [2021-12-06 18:54:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 242 proven. 976 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:54:56,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:58,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:54:58,614 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 18:54:58,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:54:58,622 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 18:54:58,627 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 18:55:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 276 proven. 942 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:55:01,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982526442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:01,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:01,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 36, 36] total 98 [2021-12-06 18:55:01,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647007837] [2021-12-06 18:55:01,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:01,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 18:55:01,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 18:55:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=8619, Unknown=3, NotChecked=0, Total=9702 [2021-12-06 18:55:01,161 INFO L87 Difference]: Start difference. First operand 23359 states and 26444 transitions. Second operand has 99 states, 98 states have (on average 6.76530612244898) internal successors, (663), 99 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:12,684 INFO L93 Difference]: Finished difference Result 44385 states and 50466 transitions. [2021-12-06 18:55:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-12-06 18:55:12,684 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 6.76530612244898) internal successors, (663), 99 states have internal predecessors, (663), 0 states have call successors, (0), 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 230 [2021-12-06 18:55:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:12,713 INFO L225 Difference]: With dead ends: 44385 [2021-12-06 18:55:12,713 INFO L226 Difference]: Without dead ends: 44385 [2021-12-06 18:55:12,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 429 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7661 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=4363, Invalid=26785, Unknown=4, NotChecked=0, Total=31152 [2021-12-06 18:55:12,715 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1187 mSDsluCounter, 6386 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 6535 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:12,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 6535 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2745 Invalid, 0 Unknown, 505 Unchecked, 1.2s Time] [2021-12-06 18:55:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44385 states. [2021-12-06 18:55:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44385 to 23078. [2021-12-06 18:55:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23078 states, 23076 states have (on average 1.1354654186167448) internal successors, (26202), 23077 states have internal predecessors, (26202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23078 states to 23078 states and 26202 transitions. [2021-12-06 18:55:13,001 INFO L78 Accepts]: Start accepts. Automaton has 23078 states and 26202 transitions. Word has length 230 [2021-12-06 18:55:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:13,001 INFO L470 AbstractCegarLoop]: Abstraction has 23078 states and 26202 transitions. [2021-12-06 18:55:13,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 6.76530612244898) internal successors, (663), 99 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 23078 states and 26202 transitions. [2021-12-06 18:55:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-06 18:55:13,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:13,011 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 19, 19, 19, 19, 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 18:55:13,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-12-06 18:55:13,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:13,212 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 18:55:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash -357722140, now seen corresponding path program 18 times [2021-12-06 18:55:13,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:13,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439441394] [2021-12-06 18:55:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:13,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 81 proven. 1905 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:55:14,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439441394] [2021-12-06 18:55:14,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439441394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744959928] [2021-12-06 18:55:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:55:14,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:14,010 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:14,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edc235-ae6b-4ad6-b5b0-6b02777d1643/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-06 18:55:15,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 18:55:15,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:55:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 139 conjunts are in the unsatisfiable core [2021-12-06 18:55:15,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:16,072 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 18:55:16,481 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 18:55:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 81 proven. 1905 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:55:16,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:16,751 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 18:55:16,752 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