./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-3.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_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/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_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/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_7b8014fb-3455-403d-8800-ee6db7b6322a/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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:22:21,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:22:21,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:22:21,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:22:21,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:22:21,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:22:21,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:22:21,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:22:21,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:22:21,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:22:21,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:22:21,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:22:21,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:22:21,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:22:21,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:22:21,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:22:21,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:22:21,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:22:21,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:22:21,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:22:21,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:22:21,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:22:21,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:22:21,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:22:21,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:22:21,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:22:21,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:22:21,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:22:21,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:22:21,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:22:21,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:22:21,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:22:21,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:22:21,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:22:21,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:22:21,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:22:21,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:22:21,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:22:21,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:22:21,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:22:21,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:22:21,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 01:22:21,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:22:21,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:22:21,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:22:21,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:22:21,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:22:21,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:22:21,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:22:21,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:22:21,881 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:22:21,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:22:21,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:22:21,881 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:22:21,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:22:21,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:22:21,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:22:21,882 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:22:21,882 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:22:21,882 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:22:21,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:22:21,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:22:21,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:22:21,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:22:21,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:22:21,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:22:21,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:22:21,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:22:21,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:22:21,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:22:21,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:22:21,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:22:21,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:22:21,884 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_7b8014fb-3455-403d-8800-ee6db7b6322a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2021-12-07 01:22:22,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:22:22,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:22:22,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:22:22,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:22:22,091 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:22:22,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety/test-0235-3.i [2021-12-07 01:22:22,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/a3c468e5d/1f34f1cab544403c9b070a50c672e628/FLAGc4b5e8e60 [2021-12-07 01:22:22,568 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:22:22,569 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/sv-benchmarks/c/memsafety/test-0235-3.i [2021-12-07 01:22:22,579 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/a3c468e5d/1f34f1cab544403c9b070a50c672e628/FLAGc4b5e8e60 [2021-12-07 01:22:22,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/a3c468e5d/1f34f1cab544403c9b070a50c672e628 [2021-12-07 01:22:22,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:22:22,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:22:22,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:22:22,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:22:22,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:22:22,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:22,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6e72ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22, skipping insertion in model container [2021-12-07 01:22:22,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:22,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:22:22,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:22:22,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:22:22,876 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:22:22,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:22:22,949 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:22:22,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22 WrapperNode [2021-12-07 01:22:22,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:22:22,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:22:22,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:22:22,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:22:22,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:22,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,006 INFO L137 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2021-12-07 01:22:23,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:22:23,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:22:23,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:22:23,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:22:23,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:22:23,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:22:23,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:22:23,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:22:23,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (1/1) ... [2021-12-07 01:22:23,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:22:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:23,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:22:23,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:22:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:22:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:22:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:22:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:22:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-07 01:22:23,114 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-07 01:22:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:22:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:22:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2021-12-07 01:22:23,114 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2021-12-07 01:22:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:22:23,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:22:23,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:22:23,202 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:22:23,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:22:23,565 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:22:23,572 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:22:23,572 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-07 01:22:23,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:22:23 BoogieIcfgContainer [2021-12-07 01:22:23,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:22:23,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:22:23,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:22:23,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:22:23,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:22:22" (1/3) ... [2021-12-07 01:22:23,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4462645b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:22:23, skipping insertion in model container [2021-12-07 01:22:23,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:22" (2/3) ... [2021-12-07 01:22:23,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4462645b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:22:23, skipping insertion in model container [2021-12-07 01:22:23,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:22:23" (3/3) ... [2021-12-07 01:22:23,582 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2021-12-07 01:22:23,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:22:23,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2021-12-07 01:22:23,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:22:23,628 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 [2021-12-07 01:22:23,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2021-12-07 01:22:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:22:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-07 01:22:23,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:23,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-07 01:22:23,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-12-07 01:22:23,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:23,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19618553] [2021-12-07 01:22:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:23,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:22:23,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:22:23,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19618553] [2021-12-07 01:22:23,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19618553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:23,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:23,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:22:23,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855520411] [2021-12-07 01:22:23,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:23,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:22:23,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:22:23,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:22:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:22:23,810 INFO L87 Difference]: Start difference. First operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:22:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:23,838 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2021-12-07 01:22:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:22:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-07 01:22:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:23,847 INFO L225 Difference]: With dead ends: 243 [2021-12-07 01:22:23,847 INFO L226 Difference]: Without dead ends: 241 [2021-12-07 01:22:23,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:22:23,851 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:23,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:22:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-07 01:22:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-12-07 01:22:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 225 states have internal predecessors, (246), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:22:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2021-12-07 01:22:23,894 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 4 [2021-12-07 01:22:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:23,894 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2021-12-07 01:22:23,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:22:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2021-12-07 01:22:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:22:23,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:23,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:22:23,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:22:23,896 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash 889942911, now seen corresponding path program 1 times [2021-12-07 01:22:23,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:23,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338585297] [2021-12-07 01:22:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:23,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:23,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:22:23,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373757175] [2021-12-07 01:22:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:23,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:23,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:23,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:22:23,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:22:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:23,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:22:23,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:22:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:22:24,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:24,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:22:24,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338585297] [2021-12-07 01:22:24,041 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:22:24,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373757175] [2021-12-07 01:22:24,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373757175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:24,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:24,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:22:24,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951491049] [2021-12-07 01:22:24,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:24,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:22:24,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:22:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:22:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:22:24,044 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:22:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:24,156 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2021-12-07 01:22:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:22:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 01:22:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:24,158 INFO L225 Difference]: With dead ends: 240 [2021-12-07 01:22:24,159 INFO L226 Difference]: Without dead ends: 240 [2021-12-07 01:22:24,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:22:24,165 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:24,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 438 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:22:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-07 01:22:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-12-07 01:22:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 137 states have (on average 1.7883211678832116) internal successors, (245), 224 states have internal predecessors, (245), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:22:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2021-12-07 01:22:24,186 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 6 [2021-12-07 01:22:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:24,186 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2021-12-07 01:22:24,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:22:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2021-12-07 01:22:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:22:24,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:24,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:24,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:22:24,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:24,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1818426896, now seen corresponding path program 1 times [2021-12-07 01:22:24,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:24,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090250726] [2021-12-07 01:22:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:24,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:24,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:22:24,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202863324] [2021-12-07 01:22:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:24,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:24,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:24,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:22:24,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:22:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:24,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:22:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:24,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:22:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:22:24,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:24,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:22:24,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090250726] [2021-12-07 01:22:24,592 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:22:24,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202863324] [2021-12-07 01:22:24,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202863324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:24,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:24,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:22:24,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152095647] [2021-12-07 01:22:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:24,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:22:24,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:22:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:22:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:22:24,594 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:22:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:24,602 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2021-12-07 01:22:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:22:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 01:22:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:24,604 INFO L225 Difference]: With dead ends: 239 [2021-12-07 01:22:24,604 INFO L226 Difference]: Without dead ends: 239 [2021-12-07 01:22:24,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:22:24,606 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:24,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 463 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2021-12-07 01:22:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-07 01:22:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-12-07 01:22:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 137 states have (on average 1.781021897810219) internal successors, (244), 223 states have internal predecessors, (244), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:22:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 270 transitions. [2021-12-07 01:22:24,623 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 270 transitions. Word has length 7 [2021-12-07 01:22:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:24,623 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 270 transitions. [2021-12-07 01:22:24,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:22:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 270 transitions. [2021-12-07 01:22:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:22:24,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:24,626 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-07 01:22:24,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:22:24,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:24,828 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash 946384938, now seen corresponding path program 1 times [2021-12-07 01:22:24,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:24,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30078675] [2021-12-07 01:22:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:24,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:24,893 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:22:24,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144251472] [2021-12-07 01:22:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:24,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:24,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:22:24,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:22:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:22:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:25,269 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:22:25,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:22:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:22:25,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:25,464 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:22:25,464 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 12 treesize of output 11 [2021-12-07 01:22:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:22:25,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:22:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30078675] [2021-12-07 01:22:25,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:22:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144251472] [2021-12-07 01:22:25,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144251472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:22:25,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:25,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-07 01:22:25,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173918393] [2021-12-07 01:22:25,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:25,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:22:25,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:22:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:22:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:22:25,505 INFO L87 Difference]: Start difference. First operand 239 states and 270 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:22:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:33,912 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2021-12-07 01:22:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:22:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-12-07 01:22:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:33,915 INFO L225 Difference]: With dead ends: 258 [2021-12-07 01:22:33,915 INFO L226 Difference]: Without dead ends: 258 [2021-12-07 01:22:33,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:22:33,917 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 99 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:33,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1966 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 681 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2021-12-07 01:22:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-07 01:22:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2021-12-07 01:22:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 146 states have (on average 1.7397260273972603) internal successors, (254), 230 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-07 01:22:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 281 transitions. [2021-12-07 01:22:33,929 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 281 transitions. Word has length 73 [2021-12-07 01:22:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:33,929 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 281 transitions. [2021-12-07 01:22:33,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:22:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 281 transitions. [2021-12-07 01:22:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:22:33,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:33,932 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-07 01:22:33,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:22:34,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:34,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 946384939, now seen corresponding path program 1 times [2021-12-07 01:22:34,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:34,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241978433] [2021-12-07 01:22:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:34,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:34,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:22:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505848913] [2021-12-07 01:22:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:34,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:34,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:34,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:22:34,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:22:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 01:22:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:34,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:22:34,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:34,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:22:34,766 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:22:34,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:22:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:22:34,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:34,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:22:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241978433] [2021-12-07 01:22:34,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:22:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505848913] [2021-12-07 01:22:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505848913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:34,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:22:34,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-07 01:22:34,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446821721] [2021-12-07 01:22:34,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:34,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:22:34,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:22:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:22:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:22:34,884 INFO L87 Difference]: Start difference. First operand 248 states and 281 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:22:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:36,196 INFO L93 Difference]: Finished difference Result 348 states and 401 transitions. [2021-12-07 01:22:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:22:36,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-12-07 01:22:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:36,199 INFO L225 Difference]: With dead ends: 348 [2021-12-07 01:22:36,199 INFO L226 Difference]: Without dead ends: 348 [2021-12-07 01:22:36,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:22:36,200 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 112 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:36,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1027 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1211 Invalid, 0 Unknown, 796 Unchecked, 1.1s Time] [2021-12-07 01:22:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-07 01:22:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 247. [2021-12-07 01:22:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.726027397260274) internal successors, (252), 229 states have internal predecessors, (252), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-07 01:22:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 279 transitions. [2021-12-07 01:22:36,209 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 279 transitions. Word has length 73 [2021-12-07 01:22:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:36,210 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 279 transitions. [2021-12-07 01:22:36,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:22:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 279 transitions. [2021-12-07 01:22:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 01:22:36,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:36,211 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:36,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:22:36,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:36,413 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:36,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1752586491, now seen corresponding path program 1 times [2021-12-07 01:22:36,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:36,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048004324] [2021-12-07 01:22:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:36,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:36,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:22:36,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491120882] [2021-12-07 01:22:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:36,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:36,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:22:36,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:22:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:22:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:36,822 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:22:36,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:22:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:22:36,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:36,958 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:22:36,958 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 12 treesize of output 11 [2021-12-07 01:22:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:22:36,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:22:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048004324] [2021-12-07 01:22:36,997 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:22:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491120882] [2021-12-07 01:22:36,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491120882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:22:36,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:36,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-07 01:22:36,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110687659] [2021-12-07 01:22:36,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:36,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:22:36,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:22:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:22:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:22:36,998 INFO L87 Difference]: Start difference. First operand 247 states and 279 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:22:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:37,302 INFO L93 Difference]: Finished difference Result 393 states and 461 transitions. [2021-12-07 01:22:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:22:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-12-07 01:22:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:37,305 INFO L225 Difference]: With dead ends: 393 [2021-12-07 01:22:37,305 INFO L226 Difference]: Without dead ends: 393 [2021-12-07 01:22:37,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:22:37,306 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 222 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:37,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1721 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 915 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2021-12-07 01:22:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-07 01:22:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-12-07 01:22:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 145 states have (on average 1.7241379310344827) internal successors, (250), 228 states have internal predecessors, (250), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-07 01:22:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 277 transitions. [2021-12-07 01:22:37,315 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 277 transitions. Word has length 74 [2021-12-07 01:22:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:37,316 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 277 transitions. [2021-12-07 01:22:37,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:22:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 277 transitions. [2021-12-07 01:22:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-07 01:22:37,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:37,317 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:37,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:22:37,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:37,519 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1057141109, now seen corresponding path program 1 times [2021-12-07 01:22:37,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:37,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943477607] [2021-12-07 01:22:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:37,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:37,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:22:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676852141] [2021-12-07 01:22:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:37,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:37,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:22:37,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:22:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:22:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:37,838 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:22:37,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:22:37,910 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:22:37,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:22:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:22:37,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:38,146 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:22:38,146 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 12 treesize of output 11 [2021-12-07 01:22:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:22:38,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:22:38,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943477607] [2021-12-07 01:22:38,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:22:38,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676852141] [2021-12-07 01:22:38,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676852141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:22:38,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:38,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-07 01:22:38,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072660539] [2021-12-07 01:22:38,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:38,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:22:38,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:22:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:22:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:22:38,171 INFO L87 Difference]: Start difference. First operand 245 states and 277 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:22:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:46,553 INFO L93 Difference]: Finished difference Result 278 states and 318 transitions. [2021-12-07 01:22:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:22:46,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2021-12-07 01:22:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:46,556 INFO L225 Difference]: With dead ends: 278 [2021-12-07 01:22:46,556 INFO L226 Difference]: Without dead ends: 278 [2021-12-07 01:22:46,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:22:46,557 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 151 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:46,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1920 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 775 Invalid, 0 Unknown, 253 Unchecked, 0.3s Time] [2021-12-07 01:22:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-07 01:22:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 269. [2021-12-07 01:22:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 166 states have (on average 1.644578313253012) internal successors, (273), 248 states have internal predecessors, (273), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-12-07 01:22:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2021-12-07 01:22:46,569 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 75 [2021-12-07 01:22:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:46,570 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2021-12-07 01:22:46,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:22:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2021-12-07 01:22:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-07 01:22:46,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:46,572 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:46,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:22:46,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:46,774 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:22:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1057141108, now seen corresponding path program 1 times [2021-12-07 01:22:46,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:22:46,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830938534] [2021-12-07 01:22:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:46,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:22:46,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:22:46,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701188901] [2021-12-07 01:22:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:46,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:22:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:22:46,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:22:46,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:22:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:46,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-07 01:22:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:55,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:22:55,382 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:22:55,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:22:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:59,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:22:59,909 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:22:59,909 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 16 treesize of output 18 [2021-12-07 01:23:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:23:07,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:07,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830938534] [2021-12-07 01:23:07,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701188901] [2021-12-07 01:23:07,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701188901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:07,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:07,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-07 01:23:07,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004954988] [2021-12-07 01:23:07,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:07,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:23:07,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:23:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:23:07,853 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:10,426 INFO L93 Difference]: Finished difference Result 384 states and 451 transitions. [2021-12-07 01:23:10,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:23:10,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2021-12-07 01:23:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:10,428 INFO L225 Difference]: With dead ends: 384 [2021-12-07 01:23:10,428 INFO L226 Difference]: Without dead ends: 384 [2021-12-07 01:23:10,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=84, Invalid=617, Unknown=1, NotChecked=0, Total=702 [2021-12-07 01:23:10,429 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 111 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:10,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1986 Invalid, 3372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 235 Invalid, 0 Unknown, 3124 Unchecked, 0.1s Time] [2021-12-07 01:23:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-07 01:23:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 283. [2021-12-07 01:23:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 177 states have (on average 1.6101694915254237) internal successors, (285), 259 states have internal predecessors, (285), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (27), 18 states have call predecessors, (27), 17 states have call successors, (27) [2021-12-07 01:23:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 329 transitions. [2021-12-07 01:23:10,438 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 329 transitions. Word has length 75 [2021-12-07 01:23:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:10,438 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 329 transitions. [2021-12-07 01:23:10,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 329 transitions. [2021-12-07 01:23:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 01:23:10,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:10,440 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:10,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:23:10,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:10,642 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:10,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 371118837, now seen corresponding path program 1 times [2021-12-07 01:23:10,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:10,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055714175] [2021-12-07 01:23:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:10,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:10,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:10,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840103984] [2021-12-07 01:23:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:10,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:10,683 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:10,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:23:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-07 01:23:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:11,186 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:23:11,229 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:11,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:11,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:11,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:23:11,364 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:23:11,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:23:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:23:11,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:11,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:11,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055714175] [2021-12-07 01:23:11,494 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:11,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840103984] [2021-12-07 01:23:11,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840103984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:11,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:11,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-07 01:23:11,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321616371] [2021-12-07 01:23:11,494 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:11,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:23:11,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:23:11,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:23:11,495 INFO L87 Difference]: Start difference. First operand 283 states and 329 transitions. Second operand has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:12,277 INFO L93 Difference]: Finished difference Result 536 states and 641 transitions. [2021-12-07 01:23:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:23:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2021-12-07 01:23:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:12,281 INFO L225 Difference]: With dead ends: 536 [2021-12-07 01:23:12,281 INFO L226 Difference]: Without dead ends: 536 [2021-12-07 01:23:12,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:23:12,281 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 244 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2457 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:12,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1121 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1361 Invalid, 0 Unknown, 2457 Unchecked, 0.6s Time] [2021-12-07 01:23:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-12-07 01:23:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 283. [2021-12-07 01:23:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 178 states have (on average 1.6123595505617978) internal successors, (287), 260 states have internal predecessors, (287), 16 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (25), 17 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-07 01:23:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 328 transitions. [2021-12-07 01:23:12,293 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 328 transitions. Word has length 76 [2021-12-07 01:23:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:12,293 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 328 transitions. [2021-12-07 01:23:12,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 328 transitions. [2021-12-07 01:23:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 01:23:12,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:12,294 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:12,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:12,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:12,496 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1287213158, now seen corresponding path program 1 times [2021-12-07 01:23:12,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:12,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599067732] [2021-12-07 01:23:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:12,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:12,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644931198] [2021-12-07 01:23:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:12,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:12,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:12,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:23:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:23:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:12,789 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:23:12,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:23:12,853 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:23:12,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:23:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:23:12,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:13,110 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:23:13,110 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 12 treesize of output 11 [2021-12-07 01:23:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:23:13,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:13,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599067732] [2021-12-07 01:23:13,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:13,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644931198] [2021-12-07 01:23:13,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644931198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:13,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:13,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-07 01:23:13,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105118885] [2021-12-07 01:23:13,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:13,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:23:13,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:13,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:23:13,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:23:13,137 INFO L87 Difference]: Start difference. First operand 283 states and 328 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:13,524 INFO L93 Difference]: Finished difference Result 429 states and 513 transitions. [2021-12-07 01:23:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:23:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2021-12-07 01:23:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:13,527 INFO L225 Difference]: With dead ends: 429 [2021-12-07 01:23:13,527 INFO L226 Difference]: Without dead ends: 429 [2021-12-07 01:23:13,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:23:13,528 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 304 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:13,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 2252 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1035 Invalid, 0 Unknown, 351 Unchecked, 0.3s Time] [2021-12-07 01:23:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-12-07 01:23:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 280. [2021-12-07 01:23:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 175 states have (on average 1.6171428571428572) internal successors, (283), 258 states have internal predecessors, (283), 16 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-07 01:23:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 324 transitions. [2021-12-07 01:23:13,537 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 324 transitions. Word has length 76 [2021-12-07 01:23:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:13,537 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 324 transitions. [2021-12-07 01:23:13,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 324 transitions. [2021-12-07 01:23:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 01:23:13,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:13,538 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:13,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:23:13,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:23:13,739 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1588364001, now seen corresponding path program 1 times [2021-12-07 01:23:13,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:13,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710341147] [2021-12-07 01:23:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:13,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:13,749 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:13,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800603913] [2021-12-07 01:23:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:13,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:13,750 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:13,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:23:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:13,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:23:13,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-07 01:23:13,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:13,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-12-07 01:23:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-07 01:23:14,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710341147] [2021-12-07 01:23:14,035 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800603913] [2021-12-07 01:23:14,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800603913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:14,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:14,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-07 01:23:14,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924834476] [2021-12-07 01:23:14,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:14,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:23:14,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:23:14,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:23:14,036 INFO L87 Difference]: Start difference. First operand 280 states and 324 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:14,239 INFO L93 Difference]: Finished difference Result 298 states and 355 transitions. [2021-12-07 01:23:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:23:14,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2021-12-07 01:23:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:14,242 INFO L225 Difference]: With dead ends: 298 [2021-12-07 01:23:14,242 INFO L226 Difference]: Without dead ends: 298 [2021-12-07 01:23:14,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:23:14,242 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 226 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:14,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 1678 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:23:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-07 01:23:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 279. [2021-12-07 01:23:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 175 states have (on average 1.6057142857142856) internal successors, (281), 257 states have internal predecessors, (281), 16 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-07 01:23:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 322 transitions. [2021-12-07 01:23:14,250 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 322 transitions. Word has length 76 [2021-12-07 01:23:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:14,251 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 322 transitions. [2021-12-07 01:23:14,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 322 transitions. [2021-12-07 01:23:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-07 01:23:14,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:14,251 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:14,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:23:14,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:14,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:14,452 INFO L85 PathProgramCache]: Analyzing trace with hash -101250807, now seen corresponding path program 1 times [2021-12-07 01:23:14,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:14,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961380313] [2021-12-07 01:23:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:14,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:14,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670161728] [2021-12-07 01:23:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:14,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:14,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:14,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:23:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 01:23:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:14,699 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:14,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:14,761 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:14,843 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:23:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:23:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:23:14,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:15,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961380313] [2021-12-07 01:23:15,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670161728] [2021-12-07 01:23:15,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670161728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:15,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:15,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-07 01:23:15,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217093496] [2021-12-07 01:23:15,016 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:15,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:23:15,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:23:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:23:15,017 INFO L87 Difference]: Start difference. First operand 279 states and 322 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:15,437 INFO L93 Difference]: Finished difference Result 497 states and 591 transitions. [2021-12-07 01:23:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:23:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-12-07 01:23:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:15,439 INFO L225 Difference]: With dead ends: 497 [2021-12-07 01:23:15,439 INFO L226 Difference]: Without dead ends: 497 [2021-12-07 01:23:15,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:23:15,440 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 280 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:15,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 2143 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1081 Invalid, 0 Unknown, 413 Unchecked, 0.3s Time] [2021-12-07 01:23:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-07 01:23:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 349. [2021-12-07 01:23:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 235 states have (on average 1.4893617021276595) internal successors, (350), 317 states have internal predecessors, (350), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (37), 22 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-07 01:23:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2021-12-07 01:23:15,451 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 82 [2021-12-07 01:23:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:15,451 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2021-12-07 01:23:15,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2021-12-07 01:23:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-07 01:23:15,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:15,452 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:15,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:23:15,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 01:23:15,652 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -101250806, now seen corresponding path program 1 times [2021-12-07 01:23:15,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458873842] [2021-12-07 01:23:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:15,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:15,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:15,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708995388] [2021-12-07 01:23:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:15,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:15,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:15,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:15,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:23:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-07 01:23:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:15,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:23:16,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:16,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:23:16,387 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:16,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:23:16,610 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:23:16,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:23:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:16,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:23:16,826 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-07 01:23:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-07 01:23:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-07 01:23:16,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:17,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:17,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458873842] [2021-12-07 01:23:17,068 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:17,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708995388] [2021-12-07 01:23:17,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708995388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:17,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:17,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-07 01:23:17,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132176655] [2021-12-07 01:23:17,069 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:17,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:23:17,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:17,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:23:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:23:17,070 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:23:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:18,344 INFO L93 Difference]: Finished difference Result 470 states and 560 transitions. [2021-12-07 01:23:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:23:18,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2021-12-07 01:23:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:18,347 INFO L225 Difference]: With dead ends: 470 [2021-12-07 01:23:18,347 INFO L226 Difference]: Without dead ends: 470 [2021-12-07 01:23:18,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:23:18,348 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 117 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1351 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:18,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1310 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1283 Invalid, 0 Unknown, 1351 Unchecked, 1.0s Time] [2021-12-07 01:23:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-07 01:23:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 367. [2021-12-07 01:23:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 250 states have (on average 1.464) internal successors, (366), 331 states have internal predecessors, (366), 25 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (43), 26 states have call predecessors, (43), 25 states have call successors, (43) [2021-12-07 01:23:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 434 transitions. [2021-12-07 01:23:18,357 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 434 transitions. Word has length 82 [2021-12-07 01:23:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:18,357 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 434 transitions. [2021-12-07 01:23:18,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:23:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 434 transitions. [2021-12-07 01:23:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:23:18,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:18,358 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:18,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:23:18,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 01:23:18,559 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1408144179, now seen corresponding path program 1 times [2021-12-07 01:23:18,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317498572] [2021-12-07 01:23:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:18,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:18,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:18,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393999890] [2021-12-07 01:23:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:18,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:18,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:18,576 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:23:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-07 01:23:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:18,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:23:19,402 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:19,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-07 01:23:19,460 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:19,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:19,895 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:19,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:19,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:23:20,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:20,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:23:20,142 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:23:20,143 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 16 treesize of output 18 [2021-12-07 01:23:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:23:20,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:20,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:20,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317498572] [2021-12-07 01:23:20,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:20,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393999890] [2021-12-07 01:23:20,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393999890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:20,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:20,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-07 01:23:20,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715050188] [2021-12-07 01:23:20,436 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:20,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 01:23:20,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:20,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 01:23:20,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:23:20,437 INFO L87 Difference]: Start difference. First operand 367 states and 434 transitions. Second operand has 26 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:22,158 INFO L93 Difference]: Finished difference Result 473 states and 562 transitions. [2021-12-07 01:23:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:23:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2021-12-07 01:23:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:22,160 INFO L225 Difference]: With dead ends: 473 [2021-12-07 01:23:22,161 INFO L226 Difference]: Without dead ends: 473 [2021-12-07 01:23:22,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:23:22,161 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 112 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3287 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:22,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1773 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1176 Invalid, 0 Unknown, 3287 Unchecked, 1.4s Time] [2021-12-07 01:23:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-12-07 01:23:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 353. [2021-12-07 01:23:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 239 states have (on average 1.4853556485355648) internal successors, (355), 321 states have internal predecessors, (355), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (37), 22 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-07 01:23:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 414 transitions. [2021-12-07 01:23:22,169 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 414 transitions. Word has length 83 [2021-12-07 01:23:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:22,170 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 414 transitions. [2021-12-07 01:23:22,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 414 transitions. [2021-12-07 01:23:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:23:22,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:22,171 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:22,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:23:22,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:23:22,372 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1156192312, now seen corresponding path program 1 times [2021-12-07 01:23:22,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:22,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68996725] [2021-12-07 01:23:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:22,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:22,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:22,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952883130] [2021-12-07 01:23:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:22,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:22,388 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:22,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:23:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:23:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-07 01:23:22,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:22,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:22,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68996725] [2021-12-07 01:23:22,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:22,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952883130] [2021-12-07 01:23:22,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952883130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:22,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:22,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:23:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335158137] [2021-12-07 01:23:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:22,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:23:22,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:23:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:23:22,558 INFO L87 Difference]: Start difference. First operand 353 states and 414 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:22,650 INFO L93 Difference]: Finished difference Result 366 states and 437 transitions. [2021-12-07 01:23:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:23:22,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2021-12-07 01:23:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:22,652 INFO L225 Difference]: With dead ends: 366 [2021-12-07 01:23:22,652 INFO L226 Difference]: Without dead ends: 366 [2021-12-07 01:23:22,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:22,652 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 167 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:22,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 537 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:23:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-07 01:23:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2021-12-07 01:23:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.4811715481171548) internal successors, (354), 320 states have internal predecessors, (354), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (37), 22 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-07 01:23:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 413 transitions. [2021-12-07 01:23:22,660 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 413 transitions. Word has length 83 [2021-12-07 01:23:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:22,660 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 413 transitions. [2021-12-07 01:23:22,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 413 transitions. [2021-12-07 01:23:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:23:22,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:22,661 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:22,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:23:22,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 01:23:22,862 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1156192313, now seen corresponding path program 1 times [2021-12-07 01:23:22,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:22,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778798207] [2021-12-07 01:23:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:22,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:22,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:22,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329028385] [2021-12-07 01:23:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:22,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:22,903 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:22,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:23:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 01:23:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:23,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:23,063 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 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-07 01:23:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:25,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:23:26,016 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:26,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:26,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:23:26,794 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:23:26,794 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 16 treesize of output 18 [2021-12-07 01:23:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:23:28,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:29,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:29,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778798207] [2021-12-07 01:23:29,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:29,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329028385] [2021-12-07 01:23:29,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329028385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:29,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:29,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-07 01:23:29,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870838330] [2021-12-07 01:23:29,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:29,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:23:29,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:23:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:23:29,237 INFO L87 Difference]: Start difference. First operand 352 states and 413 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:30,053 INFO L93 Difference]: Finished difference Result 487 states and 580 transitions. [2021-12-07 01:23:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:23:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2021-12-07 01:23:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:30,055 INFO L225 Difference]: With dead ends: 487 [2021-12-07 01:23:30,055 INFO L226 Difference]: Without dead ends: 487 [2021-12-07 01:23:30,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-12-07 01:23:30,056 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 113 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2858 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:30,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 2151 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 227 Invalid, 0 Unknown, 2858 Unchecked, 0.2s Time] [2021-12-07 01:23:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-12-07 01:23:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 383. [2021-12-07 01:23:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 266 states have (on average 1.4473684210526316) internal successors, (385), 345 states have internal predecessors, (385), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (45), 28 states have call predecessors, (45), 26 states have call successors, (45) [2021-12-07 01:23:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 456 transitions. [2021-12-07 01:23:30,065 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 456 transitions. Word has length 83 [2021-12-07 01:23:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:30,065 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 456 transitions. [2021-12-07 01:23:30,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 456 transitions. [2021-12-07 01:23:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-07 01:23:30,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:30,066 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:30,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 01:23:30,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 01:23:30,267 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash 39396258, now seen corresponding path program 1 times [2021-12-07 01:23:30,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395531373] [2021-12-07 01:23:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:30,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:30,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:30,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872814143] [2021-12-07 01:23:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:30,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:30,310 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:30,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:23:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-07 01:23:30,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:30,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-07 01:23:30,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:45,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2021-12-07 01:23:45,449 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:45,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:23:48,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:48,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2021-12-07 01:23:48,517 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:23:48,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:23:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:23:56,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:57,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395531373] [2021-12-07 01:23:57,734 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:23:57,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872814143] [2021-12-07 01:23:57,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872814143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:57,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:57,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-07 01:23:57,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310610917] [2021-12-07 01:23:57,735 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:57,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:23:57,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:57,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:23:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:23:57,736 INFO L87 Difference]: Start difference. First operand 383 states and 456 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:58,100 INFO L93 Difference]: Finished difference Result 530 states and 658 transitions. [2021-12-07 01:23:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:23:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 84 [2021-12-07 01:23:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:58,103 INFO L225 Difference]: With dead ends: 530 [2021-12-07 01:23:58,103 INFO L226 Difference]: Without dead ends: 530 [2021-12-07 01:23:58,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:23:58,103 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 114 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2680 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:58,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1220 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 232 Invalid, 0 Unknown, 2680 Unchecked, 0.1s Time] [2021-12-07 01:23:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-07 01:23:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 395. [2021-12-07 01:23:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 276 states have (on average 1.4384057971014492) internal successors, (397), 357 states have internal predecessors, (397), 26 states have call successors, (26), 9 states have call predecessors, (26), 13 states have return successors, (64), 28 states have call predecessors, (64), 26 states have call successors, (64) [2021-12-07 01:23:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 487 transitions. [2021-12-07 01:23:58,116 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 487 transitions. Word has length 84 [2021-12-07 01:23:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 487 transitions. [2021-12-07 01:23:58,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 487 transitions. [2021-12-07 01:23:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-07 01:23:58,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:58,117 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:58,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 01:23:58,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 01:23:58,319 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:23:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1872760596, now seen corresponding path program 2 times [2021-12-07 01:23:58,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:58,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952390318] [2021-12-07 01:23:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:58,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:58,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:23:58,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039566795] [2021-12-07 01:23:58,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:23:58,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:58,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:58,366 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:58,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:23:58,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:23:58,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:23:58,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-07 01:23:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:58,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:58,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-07 01:24:01,613 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:01,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:01,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:24:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:02,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:24:02,667 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:24:02,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:24:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:24:05,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:05,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952390318] [2021-12-07 01:24:05,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039566795] [2021-12-07 01:24:05,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039566795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:05,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:05,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-07 01:24:05,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525976404] [2021-12-07 01:24:05,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:05,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:24:05,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:24:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:24:05,903 INFO L87 Difference]: Start difference. First operand 395 states and 487 transitions. Second operand has 30 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:07,048 INFO L93 Difference]: Finished difference Result 561 states and 702 transitions. [2021-12-07 01:24:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:24:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-12-07 01:24:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:07,051 INFO L225 Difference]: With dead ends: 561 [2021-12-07 01:24:07,051 INFO L226 Difference]: Without dead ends: 561 [2021-12-07 01:24:07,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2021-12-07 01:24:07,052 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 114 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1768 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:07,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1509 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 832 Invalid, 0 Unknown, 1768 Unchecked, 0.3s Time] [2021-12-07 01:24:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-07 01:24:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 409. [2021-12-07 01:24:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 284 states have (on average 1.426056338028169) internal successors, (405), 365 states have internal predecessors, (405), 32 states have call successors, (32), 9 states have call predecessors, (32), 13 states have return successors, (82), 34 states have call predecessors, (82), 32 states have call successors, (82) [2021-12-07 01:24:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 519 transitions. [2021-12-07 01:24:07,062 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 519 transitions. Word has length 84 [2021-12-07 01:24:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:07,062 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 519 transitions. [2021-12-07 01:24:07,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 519 transitions. [2021-12-07 01:24:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-07 01:24:07,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:07,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:07,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 01:24:07,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 01:24:07,264 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash -221543079, now seen corresponding path program 3 times [2021-12-07 01:24:07,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:07,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417450854] [2021-12-07 01:24:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:07,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:07,274 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:07,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088966520] [2021-12-07 01:24:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:24:07,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:07,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:07,275 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:07,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:24:07,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 01:24:07,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:24:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:24:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-07 01:24:07,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:07,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417450854] [2021-12-07 01:24:07,457 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088966520] [2021-12-07 01:24:07,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088966520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:07,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:07,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:24:07,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941743207] [2021-12-07 01:24:07,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:07,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:24:07,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:24:07,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:07,459 INFO L87 Difference]: Start difference. First operand 409 states and 519 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:07,494 INFO L93 Difference]: Finished difference Result 348 states and 409 transitions. [2021-12-07 01:24:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:24:07,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 85 [2021-12-07 01:24:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:07,496 INFO L225 Difference]: With dead ends: 348 [2021-12-07 01:24:07,496 INFO L226 Difference]: Without dead ends: 318 [2021-12-07 01:24:07,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:24:07,496 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 17 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:07,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 748 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-07 01:24:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 284. [2021-12-07 01:24:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 181 states have (on average 1.591160220994475) internal successors, (288), 260 states have internal predecessors, (288), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:24:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 328 transitions. [2021-12-07 01:24:07,502 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 328 transitions. Word has length 85 [2021-12-07 01:24:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:07,503 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 328 transitions. [2021-12-07 01:24:07,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 328 transitions. [2021-12-07 01:24:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-07 01:24:07,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:07,503 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:07,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:24:07,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:07,705 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash 778945661, now seen corresponding path program 4 times [2021-12-07 01:24:07,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:07,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822869722] [2021-12-07 01:24:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:07,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:07,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:07,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992517155] [2021-12-07 01:24:07,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:24:07,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:07,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:07,759 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:07,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:24:07,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:24:07,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:24:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-07 01:24:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:07,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:08,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:08,800 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:08,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-07 01:24:08,882 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:08,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:09,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-07 01:24:09,132 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:24:09,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:24:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:24:10,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:10,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:10,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822869722] [2021-12-07 01:24:10,535 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:10,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992517155] [2021-12-07 01:24:10,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992517155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:10,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:10,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 01:24:10,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005161758] [2021-12-07 01:24:10,536 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:10,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:24:10,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:24:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:24:10,537 INFO L87 Difference]: Start difference. First operand 284 states and 328 transitions. Second operand has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:24:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:11,008 INFO L93 Difference]: Finished difference Result 431 states and 520 transitions. [2021-12-07 01:24:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 01:24:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-12-07 01:24:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:11,010 INFO L225 Difference]: With dead ends: 431 [2021-12-07 01:24:11,010 INFO L226 Difference]: Without dead ends: 431 [2021-12-07 01:24:11,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:24:11,011 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 112 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1961 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:11,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1112 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 344 Invalid, 0 Unknown, 1961 Unchecked, 0.2s Time] [2021-12-07 01:24:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-07 01:24:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 327. [2021-12-07 01:24:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 218 states have (on average 1.518348623853211) internal successors, (331), 297 states have internal predecessors, (331), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (41), 26 states have call predecessors, (41), 24 states have call successors, (41) [2021-12-07 01:24:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 396 transitions. [2021-12-07 01:24:11,018 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 396 transitions. Word has length 89 [2021-12-07 01:24:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:11,019 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 396 transitions. [2021-12-07 01:24:11,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:24:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 396 transitions. [2021-12-07 01:24:11,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:24:11,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:11,019 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:11,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:24:11,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:11,221 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:11,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1685299422, now seen corresponding path program 5 times [2021-12-07 01:24:11,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:11,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044029786] [2021-12-07 01:24:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:11,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:11,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:11,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548152388] [2021-12-07 01:24:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:24:11,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:11,274 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:11,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:24:11,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:24:11,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:24:11,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:24:11,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:24:11,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-07 01:24:11,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044029786] [2021-12-07 01:24:11,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548152388] [2021-12-07 01:24:11,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548152388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:24:11,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:11,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-07 01:24:11,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825865108] [2021-12-07 01:24:11,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:11,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:24:11,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:24:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:24:11,573 INFO L87 Difference]: Start difference. First operand 327 states and 396 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-07 01:24:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:11,693 INFO L93 Difference]: Finished difference Result 322 states and 372 transitions. [2021-12-07 01:24:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:24:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2021-12-07 01:24:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:11,695 INFO L225 Difference]: With dead ends: 322 [2021-12-07 01:24:11,695 INFO L226 Difference]: Without dead ends: 312 [2021-12-07 01:24:11,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:24:11,696 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 45 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:11,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1248 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-07 01:24:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-12-07 01:24:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 207 states have (on average 1.5458937198067633) internal successors, (320), 286 states have internal predecessors, (320), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:24:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 360 transitions. [2021-12-07 01:24:11,702 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 360 transitions. Word has length 90 [2021-12-07 01:24:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:11,702 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 360 transitions. [2021-12-07 01:24:11,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-07 01:24:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 360 transitions. [2021-12-07 01:24:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-07 01:24:11,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:11,702 INFO L514 BasicCegarLoop]: trace histogram [22, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:11,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 01:24:11,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:11,903 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2069243993, now seen corresponding path program 6 times [2021-12-07 01:24:11,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869287898] [2021-12-07 01:24:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:11,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:11,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:11,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395254822] [2021-12-07 01:24:11,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:24:11,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:11,920 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:11,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:24:12,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-07 01:24:12,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:24:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:24:12,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-07 01:24:12,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-07 01:24:12,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:12,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869287898] [2021-12-07 01:24:12,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:12,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395254822] [2021-12-07 01:24:12,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395254822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:24:12,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:12,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-07 01:24:12,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841645579] [2021-12-07 01:24:12,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:12,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:24:12,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:12,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:24:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:24:12,675 INFO L87 Difference]: Start difference. First operand 312 states and 360 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:24:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:12,957 INFO L93 Difference]: Finished difference Result 340 states and 392 transitions. [2021-12-07 01:24:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:24:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 105 [2021-12-07 01:24:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:12,959 INFO L225 Difference]: With dead ends: 340 [2021-12-07 01:24:12,959 INFO L226 Difference]: Without dead ends: 320 [2021-12-07 01:24:12,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:24:12,960 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 77 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:12,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1494 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-07 01:24:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-12-07 01:24:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 294 states have internal predecessors, (324), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:24:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 364 transitions. [2021-12-07 01:24:12,965 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 364 transitions. Word has length 105 [2021-12-07 01:24:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:12,966 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 364 transitions. [2021-12-07 01:24:12,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:24:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 364 transitions. [2021-12-07 01:24:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 01:24:12,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:12,966 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:12,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:24:13,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-07 01:24:13,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash -928119015, now seen corresponding path program 7 times [2021-12-07 01:24:13,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287895759] [2021-12-07 01:24:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:13,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:13,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:13,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088279822] [2021-12-07 01:24:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:24:13,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:13,226 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:13,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:24:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:14,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-07 01:24:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:14,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:14,747 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:14,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:24:14,760 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:14,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:14,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:24:14,896 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:24:14,896 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 16 treesize of output 18 [2021-12-07 01:24:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-07 01:24:14,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:15,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:15,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287895759] [2021-12-07 01:24:15,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:15,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088279822] [2021-12-07 01:24:15,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088279822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:15,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:15,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-07 01:24:15,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114824975] [2021-12-07 01:24:15,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:15,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:24:15,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:24:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:24:15,081 INFO L87 Difference]: Start difference. First operand 320 states and 364 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:16,276 INFO L93 Difference]: Finished difference Result 562 states and 661 transitions. [2021-12-07 01:24:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:24:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 109 [2021-12-07 01:24:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:16,279 INFO L225 Difference]: With dead ends: 562 [2021-12-07 01:24:16,279 INFO L226 Difference]: Without dead ends: 562 [2021-12-07 01:24:16,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:24:16,279 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 308 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 3870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1829 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:16,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 954 Invalid, 3870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1990 Invalid, 0 Unknown, 1829 Unchecked, 1.0s Time] [2021-12-07 01:24:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-07 01:24:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 325. [2021-12-07 01:24:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 220 states have (on average 1.509090909090909) internal successors, (332), 299 states have internal predecessors, (332), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:24:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 372 transitions. [2021-12-07 01:24:16,288 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 372 transitions. Word has length 109 [2021-12-07 01:24:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:16,288 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 372 transitions. [2021-12-07 01:24:16,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 372 transitions. [2021-12-07 01:24:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-07 01:24:16,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:16,290 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:16,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:24:16,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 01:24:16,490 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:16,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1430824346, now seen corresponding path program 1 times [2021-12-07 01:24:16,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:16,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391185190] [2021-12-07 01:24:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:16,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:16,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:16,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115943174] [2021-12-07 01:24:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:16,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:16,514 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:16,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:24:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:16,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:24:16,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:16,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391185190] [2021-12-07 01:24:16,757 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115943174] [2021-12-07 01:24:16,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115943174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:16,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:16,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:24:16,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550433046] [2021-12-07 01:24:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:16,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:16,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:16,758 INFO L87 Difference]: Start difference. First operand 325 states and 372 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:16,868 INFO L93 Difference]: Finished difference Result 330 states and 380 transitions. [2021-12-07 01:24:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 111 [2021-12-07 01:24:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:16,870 INFO L225 Difference]: With dead ends: 330 [2021-12-07 01:24:16,870 INFO L226 Difference]: Without dead ends: 330 [2021-12-07 01:24:16,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:16,871 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 84 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:16,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 367 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-07 01:24:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2021-12-07 01:24:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 220 states have (on average 1.5045454545454546) internal successors, (331), 298 states have internal predecessors, (331), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:24:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 371 transitions. [2021-12-07 01:24:16,880 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 371 transitions. Word has length 111 [2021-12-07 01:24:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:16,880 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 371 transitions. [2021-12-07 01:24:16,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 371 transitions. [2021-12-07 01:24:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 01:24:16,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:16,881 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:16,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 01:24:17,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:17,083 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:17,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1897038975, now seen corresponding path program 1 times [2021-12-07 01:24:17,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:17,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153334258] [2021-12-07 01:24:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:17,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:17,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:17,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530446749] [2021-12-07 01:24:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:17,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:17,167 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:17,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:24:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 01:24:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:17,485 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:17,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:17,548 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:17,641 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:17,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:24:17,768 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:17,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-07 01:24:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-07 01:24:17,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:18,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:18,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153334258] [2021-12-07 01:24:18,559 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530446749] [2021-12-07 01:24:18,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530446749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:18,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:18,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-07 01:24:18,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850786853] [2021-12-07 01:24:18,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:18,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:24:18,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:24:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:24:18,560 INFO L87 Difference]: Start difference. First operand 324 states and 371 transitions. Second operand has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:23,070 INFO L93 Difference]: Finished difference Result 463 states and 534 transitions. [2021-12-07 01:24:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:24:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 115 [2021-12-07 01:24:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:23,072 INFO L225 Difference]: With dead ends: 463 [2021-12-07 01:24:23,072 INFO L226 Difference]: Without dead ends: 463 [2021-12-07 01:24:23,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 122 SyntacticMatches, 19 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-12-07 01:24:23,073 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 136 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 3092 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:23,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 3092 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 845 Invalid, 0 Unknown, 604 Unchecked, 0.3s Time] [2021-12-07 01:24:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-07 01:24:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 452. [2021-12-07 01:24:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 334 states have (on average 1.3952095808383234) internal successors, (466), 411 states have internal predecessors, (466), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-07 01:24:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 528 transitions. [2021-12-07 01:24:23,079 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 528 transitions. Word has length 115 [2021-12-07 01:24:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:23,080 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 528 transitions. [2021-12-07 01:24:23,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 528 transitions. [2021-12-07 01:24:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 01:24:23,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:23,081 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:23,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:24:23,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 01:24:23,282 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1897038974, now seen corresponding path program 1 times [2021-12-07 01:24:23,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:23,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194739775] [2021-12-07 01:24:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:23,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:23,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:23,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853409546] [2021-12-07 01:24:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:23,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:23,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:23,353 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:23,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 01:24:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 191 conjunts are in the unsatisfiable core [2021-12-07 01:24:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:24,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 01:24:24,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:24:25,768 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:25,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-07 01:24:25,844 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:26,824 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:26,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-07 01:24:26,896 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:27,851 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:24:27,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:24:27,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:24:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:28,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:24:28,235 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:24:28,235 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 16 treesize of output 18 [2021-12-07 01:24:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 151 proven. 401 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 01:24:28,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:28,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:28,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194739775] [2021-12-07 01:24:28,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:28,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853409546] [2021-12-07 01:24:28,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853409546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:28,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:28,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-12-07 01:24:28,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962408373] [2021-12-07 01:24:28,928 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:28,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 01:24:28,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 01:24:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:24:28,929 INFO L87 Difference]: Start difference. First operand 452 states and 528 transitions. Second operand has 39 states, 36 states have (on average 2.361111111111111) internal successors, (85), 34 states have internal predecessors, (85), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:32,898 INFO L93 Difference]: Finished difference Result 562 states and 660 transitions. [2021-12-07 01:24:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:24:32,900 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.361111111111111) internal successors, (85), 34 states have internal predecessors, (85), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 115 [2021-12-07 01:24:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:32,904 INFO L225 Difference]: With dead ends: 562 [2021-12-07 01:24:32,904 INFO L226 Difference]: Without dead ends: 562 [2021-12-07 01:24:32,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 01:24:32,906 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 112 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1791 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:32,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1324 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1494 Invalid, 0 Unknown, 1791 Unchecked, 2.7s Time] [2021-12-07 01:24:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-07 01:24:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 459. [2021-12-07 01:24:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 341 states have (on average 1.3900293255131966) internal successors, (474), 418 states have internal predecessors, (474), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-07 01:24:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 536 transitions. [2021-12-07 01:24:32,917 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 536 transitions. Word has length 115 [2021-12-07 01:24:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:32,917 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 536 transitions. [2021-12-07 01:24:32,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.361111111111111) internal successors, (85), 34 states have internal predecessors, (85), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:24:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 536 transitions. [2021-12-07 01:24:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 01:24:32,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:32,918 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:32,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 01:24:33,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 01:24:33,120 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:33,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1321333974, now seen corresponding path program 1 times [2021-12-07 01:24:33,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:33,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696041691] [2021-12-07 01:24:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:33,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:33,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:33,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098225290] [2021-12-07 01:24:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:33,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:33,160 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:33,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 01:24:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:24:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:24:33,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:33,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696041691] [2021-12-07 01:24:33,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098225290] [2021-12-07 01:24:33,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098225290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:33,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:33,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:24:33,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857861947] [2021-12-07 01:24:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:33,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:33,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:24:33,453 INFO L87 Difference]: Start difference. First operand 459 states and 536 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:24:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:33,556 INFO L93 Difference]: Finished difference Result 467 states and 547 transitions. [2021-12-07 01:24:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:33,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 116 [2021-12-07 01:24:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:33,558 INFO L225 Difference]: With dead ends: 467 [2021-12-07 01:24:33,559 INFO L226 Difference]: Without dead ends: 467 [2021-12-07 01:24:33,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:33,559 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 139 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:33,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 536 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-07 01:24:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 458. [2021-12-07 01:24:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 341 states have (on average 1.3870967741935485) internal successors, (473), 417 states have internal predecessors, (473), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-07 01:24:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 535 transitions. [2021-12-07 01:24:33,565 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 535 transitions. Word has length 116 [2021-12-07 01:24:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:33,565 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 535 transitions. [2021-12-07 01:24:33,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:24:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 535 transitions. [2021-12-07 01:24:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 01:24:33,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:33,566 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:33,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-07 01:24:33,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 01:24:33,767 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1321333975, now seen corresponding path program 1 times [2021-12-07 01:24:33,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:33,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391543596] [2021-12-07 01:24:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:33,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:33,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:33,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526400850] [2021-12-07 01:24:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:33,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:33,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:33,823 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:33,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 01:24:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:34,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:24:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:24:34,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:34,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:24:34,267 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 19 treesize of output 23 [2021-12-07 01:24:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:24:34,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391543596] [2021-12-07 01:24:34,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526400850] [2021-12-07 01:24:34,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526400850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:24:34,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:34,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:24:34,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968708215] [2021-12-07 01:24:34,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:34,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:24:34,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:34,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:24:34,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:24:34,509 INFO L87 Difference]: Start difference. First operand 458 states and 535 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:24:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:34,830 INFO L93 Difference]: Finished difference Result 466 states and 546 transitions. [2021-12-07 01:24:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:24:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 116 [2021-12-07 01:24:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:34,832 INFO L225 Difference]: With dead ends: 466 [2021-12-07 01:24:34,832 INFO L226 Difference]: Without dead ends: 466 [2021-12-07 01:24:34,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:24:34,833 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 202 mSDsluCounter, 2678 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 2905 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:34,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 2905 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:24:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-07 01:24:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 457. [2021-12-07 01:24:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 341 states have (on average 1.3841642228739004) internal successors, (472), 416 states have internal predecessors, (472), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-07 01:24:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 534 transitions. [2021-12-07 01:24:34,840 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 534 transitions. Word has length 116 [2021-12-07 01:24:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:34,841 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 534 transitions. [2021-12-07 01:24:34,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:24:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 534 transitions. [2021-12-07 01:24:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:24:34,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:34,842 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:34,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 01:24:35,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:24:35,043 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1508368744, now seen corresponding path program 1 times [2021-12-07 01:24:35,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:35,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029858841] [2021-12-07 01:24:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:35,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:35,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:35,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606299712] [2021-12-07 01:24:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:35,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:35,093 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:35,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 01:24:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:35,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:35,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:24:35,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:35,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029858841] [2021-12-07 01:24:35,392 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606299712] [2021-12-07 01:24:35,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606299712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:35,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:35,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:24:35,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369137898] [2021-12-07 01:24:35,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:35,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:35,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:35,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:35,393 INFO L87 Difference]: Start difference. First operand 457 states and 534 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:35,536 INFO L93 Difference]: Finished difference Result 460 states and 539 transitions. [2021-12-07 01:24:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:35,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 118 [2021-12-07 01:24:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:35,539 INFO L225 Difference]: With dead ends: 460 [2021-12-07 01:24:35,539 INFO L226 Difference]: Without dead ends: 460 [2021-12-07 01:24:35,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:35,539 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 68 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:35,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 373 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-07 01:24:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 456. [2021-12-07 01:24:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 341 states have (on average 1.3812316715542523) internal successors, (471), 415 states have internal predecessors, (471), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-07 01:24:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 533 transitions. [2021-12-07 01:24:35,545 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 533 transitions. Word has length 118 [2021-12-07 01:24:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:35,546 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 533 transitions. [2021-12-07 01:24:35,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 533 transitions. [2021-12-07 01:24:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:24:35,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:35,546 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:35,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-07 01:24:35,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 01:24:35,747 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1991861505, now seen corresponding path program 1 times [2021-12-07 01:24:35,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:35,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587998380] [2021-12-07 01:24:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:35,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:35,765 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:35,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398521267] [2021-12-07 01:24:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:35,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:35,766 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:35,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 01:24:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-07 01:24:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:36,157 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:36,255 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:24:36,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:24:36,383 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-07 01:24:36,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-12-07 01:24:36,505 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-07 01:24:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 38 [2021-12-07 01:24:36,712 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-07 01:24:36,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 44 [2021-12-07 01:24:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 498 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-07 01:24:37,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:37,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587998380] [2021-12-07 01:24:37,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398521267] [2021-12-07 01:24:37,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398521267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:37,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:37,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-07 01:24:37,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303165250] [2021-12-07 01:24:37,207 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:37,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 01:24:37,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 01:24:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-07 01:24:37,208 INFO L87 Difference]: Start difference. First operand 456 states and 533 transitions. Second operand has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:24:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:41,663 INFO L93 Difference]: Finished difference Result 737 states and 874 transitions. [2021-12-07 01:24:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:24:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2021-12-07 01:24:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:41,666 INFO L225 Difference]: With dead ends: 737 [2021-12-07 01:24:41,666 INFO L226 Difference]: Without dead ends: 737 [2021-12-07 01:24:41,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=180, Invalid=1224, Unknown=2, NotChecked=0, Total=1406 [2021-12-07 01:24:41,667 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 137 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:41,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 3218 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 578 Invalid, 0 Unknown, 924 Unchecked, 0.2s Time] [2021-12-07 01:24:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-12-07 01:24:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 731. [2021-12-07 01:24:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 585 states have (on average 1.3042735042735043) internal successors, (763), 659 states have internal predecessors, (763), 54 states have call successors, (54), 17 states have call predecessors, (54), 17 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-07 01:24:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 871 transitions. [2021-12-07 01:24:41,676 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 871 transitions. Word has length 122 [2021-12-07 01:24:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 871 transitions. [2021-12-07 01:24:41,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:24:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 871 transitions. [2021-12-07 01:24:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:24:41,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:41,677 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:41,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-07 01:24:41,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:41,878 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1991861504, now seen corresponding path program 1 times [2021-12-07 01:24:41,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369225575] [2021-12-07 01:24:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:41,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:41,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:41,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819847681] [2021-12-07 01:24:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:41,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:41,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:41,936 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:41,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 01:24:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-07 01:24:42,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 01:24:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:24:44,119 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:44,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:44,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:24:44,816 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:24:44,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:24:44,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:24:45,275 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:45,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-07 01:24:45,371 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-12-07 01:24:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2021-12-07 01:24:46,333 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-12-07 01:24:46,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2021-12-07 01:24:46,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:24:46,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:46,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:24:46,765 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-12-07 01:24:46,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2021-12-07 01:24:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 69 proven. 443 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-07 01:24:47,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:47,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:47,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369225575] [2021-12-07 01:24:47,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:47,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819847681] [2021-12-07 01:24:47,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819847681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:47,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:47,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-07 01:24:47,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957268967] [2021-12-07 01:24:47,385 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:47,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:24:47,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:47,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:24:47,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:24:47,386 INFO L87 Difference]: Start difference. First operand 731 states and 871 transitions. Second operand has 32 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:24:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:51,776 INFO L93 Difference]: Finished difference Result 870 states and 1034 transitions. [2021-12-07 01:24:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:24:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2021-12-07 01:24:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:51,783 INFO L225 Difference]: With dead ends: 870 [2021-12-07 01:24:51,783 INFO L226 Difference]: Without dead ends: 870 [2021-12-07 01:24:51,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:24:51,784 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 120 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2105 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:51,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1444 Invalid, 3227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1107 Invalid, 0 Unknown, 2105 Unchecked, 3.2s Time] [2021-12-07 01:24:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-12-07 01:24:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 768. [2021-12-07 01:24:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 618 states have (on average 1.2928802588996764) internal successors, (799), 694 states have internal predecessors, (799), 56 states have call successors, (56), 19 states have call predecessors, (56), 19 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-07 01:24:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 911 transitions. [2021-12-07 01:24:51,796 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 911 transitions. Word has length 122 [2021-12-07 01:24:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:51,797 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 911 transitions. [2021-12-07 01:24:51,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:24:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 911 transitions. [2021-12-07 01:24:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-07 01:24:51,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:51,798 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:51,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-07 01:24:51,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:51,999 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1618164434, now seen corresponding path program 1 times [2021-12-07 01:24:52,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080838092] [2021-12-07 01:24:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:52,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:52,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:52,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097073806] [2021-12-07 01:24:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:52,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:52,093 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:52,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 01:24:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:24:52,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:24:52,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:52,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080838092] [2021-12-07 01:24:52,461 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097073806] [2021-12-07 01:24:52,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097073806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:52,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:52,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:24:52,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522157282] [2021-12-07 01:24:52,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:52,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:52,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:24:52,462 INFO L87 Difference]: Start difference. First operand 768 states and 911 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:24:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:52,569 INFO L93 Difference]: Finished difference Result 771 states and 915 transitions. [2021-12-07 01:24:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2021-12-07 01:24:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:52,572 INFO L225 Difference]: With dead ends: 771 [2021-12-07 01:24:52,572 INFO L226 Difference]: Without dead ends: 771 [2021-12-07 01:24:52,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:52,572 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 111 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:52,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 533 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-07 01:24:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 767. [2021-12-07 01:24:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 618 states have (on average 1.2912621359223302) internal successors, (798), 693 states have internal predecessors, (798), 56 states have call successors, (56), 19 states have call predecessors, (56), 19 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-07 01:24:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 910 transitions. [2021-12-07 01:24:52,581 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 910 transitions. Word has length 123 [2021-12-07 01:24:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:52,582 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 910 transitions. [2021-12-07 01:24:52,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:24:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 910 transitions. [2021-12-07 01:24:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-07 01:24:52,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:52,583 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:52,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-07 01:24:52,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:52,784 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1618164433, now seen corresponding path program 1 times [2021-12-07 01:24:52,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:52,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611073488] [2021-12-07 01:24:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:52,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:52,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:52,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42018763] [2021-12-07 01:24:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:52,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:52,848 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:52,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 01:24:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-07 01:24:53,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:53,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 01:24:53,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:53,938 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:53,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:53,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:24:54,208 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:54,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:24:54,221 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:54,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:54,506 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:24:54,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:24:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:24:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:54,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:24:54,698 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-07 01:24:54,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-07 01:24:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 242 proven. 300 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-07 01:24:54,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:54,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:54,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611073488] [2021-12-07 01:24:54,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:54,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42018763] [2021-12-07 01:24:54,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42018763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:54,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:54,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-12-07 01:24:54,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165245957] [2021-12-07 01:24:54,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:54,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:24:54,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:24:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 01:24:54,997 INFO L87 Difference]: Start difference. First operand 767 states and 910 transitions. Second operand has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:24:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:55,891 INFO L93 Difference]: Finished difference Result 948 states and 1131 transitions. [2021-12-07 01:24:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:24:55,892 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 123 [2021-12-07 01:24:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:55,895 INFO L225 Difference]: With dead ends: 948 [2021-12-07 01:24:55,895 INFO L226 Difference]: Without dead ends: 948 [2021-12-07 01:24:55,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:24:55,896 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 176 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 3804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2007 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:55,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 941 Invalid, 3804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1770 Invalid, 0 Unknown, 2007 Unchecked, 0.7s Time] [2021-12-07 01:24:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-12-07 01:24:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 775. [2021-12-07 01:24:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 626 states have (on average 1.292332268370607) internal successors, (809), 701 states have internal predecessors, (809), 56 states have call successors, (56), 19 states have call predecessors, (56), 19 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-07 01:24:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 921 transitions. [2021-12-07 01:24:55,907 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 921 transitions. Word has length 123 [2021-12-07 01:24:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:55,907 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 921 transitions. [2021-12-07 01:24:55,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:24:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 921 transitions. [2021-12-07 01:24:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:24:55,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:55,908 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:55,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-07 01:24:56,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:56,108 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -277857361, now seen corresponding path program 1 times [2021-12-07 01:24:56,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365121858] [2021-12-07 01:24:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:56,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:56,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169487841] [2021-12-07 01:24:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:56,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:56,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:56,129 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:56,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 01:24:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:24:56,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:56,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:56,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365121858] [2021-12-07 01:24:56,445 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:56,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169487841] [2021-12-07 01:24:56,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169487841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:56,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:56,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:24:56,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051305996] [2021-12-07 01:24:56,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:56,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:56,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:56,446 INFO L87 Difference]: Start difference. First operand 775 states and 921 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:56,532 INFO L93 Difference]: Finished difference Result 776 states and 923 transitions. [2021-12-07 01:24:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:56,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-12-07 01:24:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:56,535 INFO L225 Difference]: With dead ends: 776 [2021-12-07 01:24:56,535 INFO L226 Difference]: Without dead ends: 776 [2021-12-07 01:24:56,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:56,536 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 25 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:56,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 408 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-12-07 01:24:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 774. [2021-12-07 01:24:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 626 states have (on average 1.29073482428115) internal successors, (808), 700 states have internal predecessors, (808), 56 states have call successors, (56), 19 states have call predecessors, (56), 19 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-07 01:24:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 920 transitions. [2021-12-07 01:24:56,545 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 920 transitions. Word has length 125 [2021-12-07 01:24:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:56,545 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 920 transitions. [2021-12-07 01:24:56,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 920 transitions. [2021-12-07 01:24:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:24:56,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:56,546 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:56,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-07 01:24:56,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-07 01:24:56,747 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash -277857360, now seen corresponding path program 1 times [2021-12-07 01:24:56,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:56,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163653252] [2021-12-07 01:24:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:56,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:56,814 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:56,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777555225] [2021-12-07 01:24:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:56,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:56,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:56,815 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:56,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 01:24:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:24:57,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:57,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:57,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163653252] [2021-12-07 01:24:57,177 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:57,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777555225] [2021-12-07 01:24:57,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777555225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:57,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:57,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:24:57,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449490223] [2021-12-07 01:24:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:57,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:57,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:57,178 INFO L87 Difference]: Start difference. First operand 774 states and 920 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:57,365 INFO L93 Difference]: Finished difference Result 775 states and 922 transitions. [2021-12-07 01:24:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-12-07 01:24:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:57,369 INFO L225 Difference]: With dead ends: 775 [2021-12-07 01:24:57,369 INFO L226 Difference]: Without dead ends: 775 [2021-12-07 01:24:57,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:57,369 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 54 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:57,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 378 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:24:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-12-07 01:24:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 773. [2021-12-07 01:24:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 626 states have (on average 1.2891373801916932) internal successors, (807), 699 states have internal predecessors, (807), 56 states have call successors, (56), 19 states have call predecessors, (56), 19 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-07 01:24:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 919 transitions. [2021-12-07 01:24:57,379 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 919 transitions. Word has length 125 [2021-12-07 01:24:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:57,379 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 919 transitions. [2021-12-07 01:24:57,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:24:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 919 transitions. [2021-12-07 01:24:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:24:57,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:57,380 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:57,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-07 01:24:57,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-07 01:24:57,580 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:24:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash 10797464, now seen corresponding path program 1 times [2021-12-07 01:24:57,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:57,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127916309] [2021-12-07 01:24:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:57,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:57,602 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:57,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637489159] [2021-12-07 01:24:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:57,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:57,603 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:57,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 01:24:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-07 01:24:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:58,052 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:24:58,066 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:24:58,237 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:58,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:24:58,255 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:24:58,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:24:58,508 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-12-07 01:24:58,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2021-12-07 01:24:58,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:24:58,789 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-12-07 01:24:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2021-12-07 01:24:58,865 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:58,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:24:59,378 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-07 01:24:59,406 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-12-07 01:24:59,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 54 [2021-12-07 01:24:59,863 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:59,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-07 01:24:59,896 INFO L354 Elim1Store]: treesize reduction 4, result has 93.0 percent of original size [2021-12-07 01:24:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 38 treesize of output 80 [2021-12-07 01:25:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 32 proven. 466 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-07 01:25:00,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:01,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:01,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127916309] [2021-12-07 01:25:01,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:01,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637489159] [2021-12-07 01:25:01,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637489159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:25:01,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:25:01,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-12-07 01:25:01,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888755530] [2021-12-07 01:25:01,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:25:01,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 01:25:01,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 01:25:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:25:01,008 INFO L87 Difference]: Start difference. First operand 773 states and 919 transitions. Second operand has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:25:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:01,609 INFO L93 Difference]: Finished difference Result 982 states and 1163 transitions. [2021-12-07 01:25:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 01:25:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 129 [2021-12-07 01:25:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:01,612 INFO L225 Difference]: With dead ends: 982 [2021-12-07 01:25:01,612 INFO L226 Difference]: Without dead ends: 982 [2021-12-07 01:25:01,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-12-07 01:25:01,613 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 153 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1581 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:01,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1480 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 903 Invalid, 0 Unknown, 1581 Unchecked, 0.5s Time] [2021-12-07 01:25:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-12-07 01:25:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 846. [2021-12-07 01:25:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 691 states have (on average 1.2720694645441388) internal successors, (879), 764 states have internal predecessors, (879), 62 states have call successors, (62), 21 states have call predecessors, (62), 21 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2021-12-07 01:25:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1003 transitions. [2021-12-07 01:25:01,624 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1003 transitions. Word has length 129 [2021-12-07 01:25:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:01,624 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1003 transitions. [2021-12-07 01:25:01,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:25:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1003 transitions. [2021-12-07 01:25:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:25:01,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:01,625 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:01,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-07 01:25:01,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 01:25:01,826 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash 10797463, now seen corresponding path program 1 times [2021-12-07 01:25:01,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:01,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290796877] [2021-12-07 01:25:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:01,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:01,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:01,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033780820] [2021-12-07 01:25:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:01,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:01,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:01,864 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:01,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 01:25:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:25:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:02,233 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:02,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:02,301 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:02,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:02,370 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:02,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:02,442 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:02,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:02,507 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:02,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:02,573 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:02,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:02,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:02,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:02,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290796877] [2021-12-07 01:25:02,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:02,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033780820] [2021-12-07 01:25:02,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033780820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:02,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:02,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:25:02,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377351743] [2021-12-07 01:25:02,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:02,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:25:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:25:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:25:02,637 INFO L87 Difference]: Start difference. First operand 846 states and 1003 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:02,907 INFO L93 Difference]: Finished difference Result 1590 states and 1897 transitions. [2021-12-07 01:25:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:25:02,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2021-12-07 01:25:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:02,915 INFO L225 Difference]: With dead ends: 1590 [2021-12-07 01:25:02,915 INFO L226 Difference]: Without dead ends: 1590 [2021-12-07 01:25:02,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:25:02,916 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 171 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:02,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1047 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 416 Invalid, 0 Unknown, 279 Unchecked, 0.2s Time] [2021-12-07 01:25:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-12-07 01:25:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1427. [2021-12-07 01:25:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1210 states have (on average 1.2429752066115702) internal successors, (1504), 1285 states have internal predecessors, (1504), 105 states have call successors, (105), 40 states have call predecessors, (105), 40 states have return successors, (105), 101 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-07 01:25:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 1714 transitions. [2021-12-07 01:25:02,938 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 1714 transitions. Word has length 129 [2021-12-07 01:25:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:02,938 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 1714 transitions. [2021-12-07 01:25:02,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:02,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 1714 transitions. [2021-12-07 01:25:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-07 01:25:02,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:02,939 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:02,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-07 01:25:03,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 01:25:03,140 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash 334721452, now seen corresponding path program 1 times [2021-12-07 01:25:03,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:03,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708220841] [2021-12-07 01:25:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:03,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:03,164 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:03,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722560912] [2021-12-07 01:25:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:03,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:03,165 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:03,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 01:25:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:03,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:25:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:03,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:03,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708220841] [2021-12-07 01:25:03,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722560912] [2021-12-07 01:25:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722560912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:03,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:03,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:25:03,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874048088] [2021-12-07 01:25:03,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:03,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:25:03,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:25:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:25:03,563 INFO L87 Difference]: Start difference. First operand 1427 states and 1714 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:25:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:03,658 INFO L93 Difference]: Finished difference Result 1426 states and 1712 transitions. [2021-12-07 01:25:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:25:03,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2021-12-07 01:25:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:03,664 INFO L225 Difference]: With dead ends: 1426 [2021-12-07 01:25:03,664 INFO L226 Difference]: Without dead ends: 1426 [2021-12-07 01:25:03,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:25:03,664 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 85 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:03,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 532 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:25:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-12-07 01:25:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1426. [2021-12-07 01:25:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1210 states have (on average 1.2413223140495868) internal successors, (1502), 1284 states have internal predecessors, (1502), 105 states have call successors, (105), 40 states have call predecessors, (105), 40 states have return successors, (105), 101 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-07 01:25:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1712 transitions. [2021-12-07 01:25:03,683 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1712 transitions. Word has length 130 [2021-12-07 01:25:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:03,683 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 1712 transitions. [2021-12-07 01:25:03,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:25:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1712 transitions. [2021-12-07 01:25:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-07 01:25:03,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:03,684 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:03,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-07 01:25:03,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:03,885 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash 334721453, now seen corresponding path program 1 times [2021-12-07 01:25:03,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:03,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210021198] [2021-12-07 01:25:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:03,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:03,942 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:03,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737171806] [2021-12-07 01:25:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:03,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:03,943 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:03,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 01:25:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 01:25:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:25:04,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:04,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:25:04,581 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 19 treesize of output 23 [2021-12-07 01:25:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:25:04,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210021198] [2021-12-07 01:25:04,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737171806] [2021-12-07 01:25:04,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737171806] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:25:04,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:25:04,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:25:04,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919716298] [2021-12-07 01:25:04,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:25:04,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:25:04,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:25:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:25:04,959 INFO L87 Difference]: Start difference. First operand 1426 states and 1712 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:25:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:05,335 INFO L93 Difference]: Finished difference Result 1425 states and 1710 transitions. [2021-12-07 01:25:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:25:05,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-12-07 01:25:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:05,341 INFO L225 Difference]: With dead ends: 1425 [2021-12-07 01:25:05,341 INFO L226 Difference]: Without dead ends: 1425 [2021-12-07 01:25:05,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:25:05,341 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 274 mSDsluCounter, 2429 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:05,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 2653 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:25:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-12-07 01:25:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1425. [2021-12-07 01:25:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1210 states have (on average 1.2396694214876034) internal successors, (1500), 1283 states have internal predecessors, (1500), 105 states have call successors, (105), 40 states have call predecessors, (105), 40 states have return successors, (105), 101 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-07 01:25:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1710 transitions. [2021-12-07 01:25:05,358 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1710 transitions. Word has length 130 [2021-12-07 01:25:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:05,358 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 1710 transitions. [2021-12-07 01:25:05,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:25:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1710 transitions. [2021-12-07 01:25:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 01:25:05,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:05,359 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:05,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 01:25:05,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-07 01:25:05,560 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:05,561 INFO L85 PathProgramCache]: Analyzing trace with hash -455228562, now seen corresponding path program 1 times [2021-12-07 01:25:05,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:05,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767958649] [2021-12-07 01:25:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:05,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:05,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:05,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361775627] [2021-12-07 01:25:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:05,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:05,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:05,632 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:05,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 01:25:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:05,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:25:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:06,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:06,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767958649] [2021-12-07 01:25:06,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361775627] [2021-12-07 01:25:06,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361775627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:06,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:06,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:25:06,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383797095] [2021-12-07 01:25:06,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:06,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:25:06,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:25:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:25:06,033 INFO L87 Difference]: Start difference. First operand 1425 states and 1710 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:06,206 INFO L93 Difference]: Finished difference Result 1424 states and 1708 transitions. [2021-12-07 01:25:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:25:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2021-12-07 01:25:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:06,212 INFO L225 Difference]: With dead ends: 1424 [2021-12-07 01:25:06,212 INFO L226 Difference]: Without dead ends: 1424 [2021-12-07 01:25:06,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:25:06,212 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:06,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 384 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:25:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-12-07 01:25:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1424. [2021-12-07 01:25:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1210 states have (on average 1.2380165289256198) internal successors, (1498), 1282 states have internal predecessors, (1498), 105 states have call successors, (105), 40 states have call predecessors, (105), 40 states have return successors, (105), 101 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-07 01:25:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 1708 transitions. [2021-12-07 01:25:06,228 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 1708 transitions. Word has length 132 [2021-12-07 01:25:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:06,228 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 1708 transitions. [2021-12-07 01:25:06,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 1708 transitions. [2021-12-07 01:25:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-07 01:25:06,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:06,229 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:06,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-07 01:25:06,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 01:25:06,431 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash -260665387, now seen corresponding path program 1 times [2021-12-07 01:25:06,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:06,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739123322] [2021-12-07 01:25:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:06,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:06,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:06,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176520026] [2021-12-07 01:25:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:06,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:06,526 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:06,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-07 01:25:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:25:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:07,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:07,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:07,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739123322] [2021-12-07 01:25:07,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:07,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176520026] [2021-12-07 01:25:07,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176520026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:07,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:07,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:25:07,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82931883] [2021-12-07 01:25:07,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:07,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:25:07,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:25:07,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:25:07,084 INFO L87 Difference]: Start difference. First operand 1424 states and 1708 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:07,285 INFO L93 Difference]: Finished difference Result 1543 states and 1848 transitions. [2021-12-07 01:25:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:25:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2021-12-07 01:25:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:07,291 INFO L225 Difference]: With dead ends: 1543 [2021-12-07 01:25:07,291 INFO L226 Difference]: Without dead ends: 1543 [2021-12-07 01:25:07,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:25:07,292 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 640 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:07,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 334 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:25:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-12-07 01:25:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1475. [2021-12-07 01:25:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1263 states have (on average 1.2565320665083135) internal successors, (1587), 1326 states have internal predecessors, (1587), 105 states have call successors, (105), 40 states have call predecessors, (105), 41 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 1804 transitions. [2021-12-07 01:25:07,311 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 1804 transitions. Word has length 136 [2021-12-07 01:25:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:07,311 INFO L470 AbstractCegarLoop]: Abstraction has 1475 states and 1804 transitions. [2021-12-07 01:25:07,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 1804 transitions. [2021-12-07 01:25:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-07 01:25:07,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:07,312 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:07,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-07 01:25:07,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:07,513 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:07,514 INFO L85 PathProgramCache]: Analyzing trace with hash -260665386, now seen corresponding path program 1 times [2021-12-07 01:25:07,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:07,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066844842] [2021-12-07 01:25:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:07,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:07,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:07,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200397342] [2021-12-07 01:25:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:07,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:07,615 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:07,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 01:25:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:25:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:08,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:08,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066844842] [2021-12-07 01:25:08,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200397342] [2021-12-07 01:25:08,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200397342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:08,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:08,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:25:08,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841162351] [2021-12-07 01:25:08,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:25:08,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:25:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:25:08,309 INFO L87 Difference]: Start difference. First operand 1475 states and 1804 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:08,465 INFO L93 Difference]: Finished difference Result 1469 states and 1791 transitions. [2021-12-07 01:25:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:25:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2021-12-07 01:25:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:08,471 INFO L225 Difference]: With dead ends: 1469 [2021-12-07 01:25:08,471 INFO L226 Difference]: Without dead ends: 1469 [2021-12-07 01:25:08,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:25:08,471 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 408 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:08,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 333 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:25:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-12-07 01:25:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1467. [2021-12-07 01:25:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1263 states have (on average 1.2446555819477434) internal successors, (1572), 1318 states have internal predecessors, (1572), 105 states have call successors, (105), 40 states have call predecessors, (105), 41 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1789 transitions. [2021-12-07 01:25:08,493 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1789 transitions. Word has length 136 [2021-12-07 01:25:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:08,493 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 1789 transitions. [2021-12-07 01:25:08,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1789 transitions. [2021-12-07 01:25:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 01:25:08,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:08,495 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:08,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-07 01:25:08,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-07 01:25:08,696 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1324841975, now seen corresponding path program 1 times [2021-12-07 01:25:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619612237] [2021-12-07 01:25:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:08,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:08,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:08,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461098447] [2021-12-07 01:25:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:08,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:08,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:08,720 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:08,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-07 01:25:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:09,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:25:09,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:09,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:09,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619612237] [2021-12-07 01:25:09,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461098447] [2021-12-07 01:25:09,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461098447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:09,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:09,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:25:09,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170906184] [2021-12-07 01:25:09,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:09,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:25:09,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:25:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:25:09,159 INFO L87 Difference]: Start difference. First operand 1467 states and 1789 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:09,175 INFO L93 Difference]: Finished difference Result 1607 states and 1971 transitions. [2021-12-07 01:25:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:25:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2021-12-07 01:25:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:09,181 INFO L225 Difference]: With dead ends: 1607 [2021-12-07 01:25:09,181 INFO L226 Difference]: Without dead ends: 1607 [2021-12-07 01:25:09,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:25:09,182 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 215 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:09,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 702 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:25:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-12-07 01:25:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1572. [2021-12-07 01:25:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1366 states have (on average 1.2840409956076135) internal successors, (1754), 1422 states have internal predecessors, (1754), 105 states have call successors, (105), 41 states have call predecessors, (105), 43 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 1971 transitions. [2021-12-07 01:25:09,205 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 1971 transitions. Word has length 140 [2021-12-07 01:25:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:09,205 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 1971 transitions. [2021-12-07 01:25:09,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 1971 transitions. [2021-12-07 01:25:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 01:25:09,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:09,207 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:09,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-07 01:25:09,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-07 01:25:09,407 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting l0_destroyErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1324847448, now seen corresponding path program 1 times [2021-12-07 01:25:09,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595336011] [2021-12-07 01:25:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:09,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:09,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:09,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983608856] [2021-12-07 01:25:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:09,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:09,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:09,477 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:09,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-07 01:25:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 01:25:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:10,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:25:10,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-07 01:25:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:10,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:10,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:10,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595336011] [2021-12-07 01:25:10,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:10,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983608856] [2021-12-07 01:25:10,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983608856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:10,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:10,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:25:10,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970440677] [2021-12-07 01:25:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:10,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:25:10,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:10,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:25:10,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:25:10,254 INFO L87 Difference]: Start difference. First operand 1572 states and 1971 transitions. Second operand has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:10,715 INFO L93 Difference]: Finished difference Result 1888 states and 2351 transitions. [2021-12-07 01:25:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:25:10,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2021-12-07 01:25:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:10,721 INFO L225 Difference]: With dead ends: 1888 [2021-12-07 01:25:10,721 INFO L226 Difference]: Without dead ends: 1888 [2021-12-07 01:25:10,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:25:10,722 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 774 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:10,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 1065 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:25:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-12-07 01:25:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1644. [2021-12-07 01:25:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1439 states have (on average 1.307157748436414) internal successors, (1881), 1494 states have internal predecessors, (1881), 105 states have call successors, (105), 41 states have call predecessors, (105), 43 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2098 transitions. [2021-12-07 01:25:10,749 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2098 transitions. Word has length 140 [2021-12-07 01:25:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:10,749 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 2098 transitions. [2021-12-07 01:25:10,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2098 transitions. [2021-12-07 01:25:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 01:25:10,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:10,751 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:10,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-07 01:25:10,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-07 01:25:10,951 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting l0_destroyErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1324847447, now seen corresponding path program 1 times [2021-12-07 01:25:10,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:10,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349009431] [2021-12-07 01:25:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:10,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:10,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:10,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948547993] [2021-12-07 01:25:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:10,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:10,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:10,977 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:10,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-07 01:25:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:11,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 01:25:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:12,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:25:12,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:25:12,273 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 23 treesize of output 15 [2021-12-07 01:25:12,274 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 26 treesize of output 14 [2021-12-07 01:25:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:12,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:12,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349009431] [2021-12-07 01:25:12,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948547993] [2021-12-07 01:25:12,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948547993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:12,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:12,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 01:25:12,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190342546] [2021-12-07 01:25:12,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:12,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:25:12,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:25:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:25:12,370 INFO L87 Difference]: Start difference. First operand 1644 states and 2098 transitions. Second operand has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:25:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:13,155 INFO L93 Difference]: Finished difference Result 1805 states and 2261 transitions. [2021-12-07 01:25:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:25:13,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 140 [2021-12-07 01:25:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:13,159 INFO L225 Difference]: With dead ends: 1805 [2021-12-07 01:25:13,160 INFO L226 Difference]: Without dead ends: 1805 [2021-12-07 01:25:13,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:25:13,160 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 1149 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:13,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 911 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:25:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-12-07 01:25:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1731. [2021-12-07 01:25:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1526 states have (on average 1.334862385321101) internal successors, (2037), 1581 states have internal predecessors, (2037), 105 states have call successors, (105), 41 states have call predecessors, (105), 43 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2254 transitions. [2021-12-07 01:25:13,178 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2254 transitions. Word has length 140 [2021-12-07 01:25:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:13,178 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2254 transitions. [2021-12-07 01:25:13,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:25:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2254 transitions. [2021-12-07 01:25:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-07 01:25:13,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:13,179 INFO L514 BasicCegarLoop]: trace histogram [36, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:13,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-07 01:25:13,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-07 01:25:13,380 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash 233936620, now seen corresponding path program 1 times [2021-12-07 01:25:13,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:13,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403048364] [2021-12-07 01:25:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:13,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:13,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:13,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561019975] [2021-12-07 01:25:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:13,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:13,438 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:13,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-07 01:25:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 01:25:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:13,990 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:14,068 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:25:14,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2021-12-07 01:25:14,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:14,252 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:25:14,252 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 12 treesize of output 11 [2021-12-07 01:25:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2021-12-07 01:25:14,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403048364] [2021-12-07 01:25:14,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561019975] [2021-12-07 01:25:14,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561019975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:25:14,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:25:14,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-07 01:25:14,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207537555] [2021-12-07 01:25:14,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:25:14,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:25:14,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:25:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:25:14,325 INFO L87 Difference]: Start difference. First operand 1731 states and 2254 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:25:14,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:14,576 INFO L93 Difference]: Finished difference Result 1839 states and 2374 transitions. [2021-12-07 01:25:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:25:14,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 142 [2021-12-07 01:25:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:14,579 INFO L225 Difference]: With dead ends: 1839 [2021-12-07 01:25:14,579 INFO L226 Difference]: Without dead ends: 1839 [2021-12-07 01:25:14,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 267 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:25:14,580 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 343 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:14,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1004 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 356 Invalid, 0 Unknown, 294 Unchecked, 0.2s Time] [2021-12-07 01:25:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-12-07 01:25:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1730. [2021-12-07 01:25:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1526 states have (on average 1.3243774574049803) internal successors, (2021), 1580 states have internal predecessors, (2021), 105 states have call successors, (105), 41 states have call predecessors, (105), 43 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2238 transitions. [2021-12-07 01:25:14,601 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2238 transitions. Word has length 142 [2021-12-07 01:25:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:14,601 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 2238 transitions. [2021-12-07 01:25:14,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:25:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2238 transitions. [2021-12-07 01:25:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-07 01:25:14,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:14,602 INFO L514 BasicCegarLoop]: trace histogram [36, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:14,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-07 01:25:14,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:14,803 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 233936621, now seen corresponding path program 1 times [2021-12-07 01:25:14,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:14,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656330099] [2021-12-07 01:25:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:14,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:14,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147622865] [2021-12-07 01:25:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:14,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:14,901 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:14,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-07 01:25:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-07 01:25:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:15,612 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:25:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:25:15,629 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:25:15,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:25:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:15,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:25:15,788 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:25:15,788 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 16 treesize of output 18 [2021-12-07 01:25:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 503 proven. 196 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2021-12-07 01:25:15,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:15,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656330099] [2021-12-07 01:25:15,947 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147622865] [2021-12-07 01:25:15,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147622865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:25:15,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:25:15,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-07 01:25:15,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844225700] [2021-12-07 01:25:15,947 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:25:15,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:25:15,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:25:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:25:15,948 INFO L87 Difference]: Start difference. First operand 1730 states and 2238 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:25:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:16,936 INFO L93 Difference]: Finished difference Result 2053 states and 2625 transitions. [2021-12-07 01:25:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:25:16,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2021-12-07 01:25:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:16,940 INFO L225 Difference]: With dead ends: 2053 [2021-12-07 01:25:16,940 INFO L226 Difference]: Without dead ends: 2053 [2021-12-07 01:25:16,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:25:16,941 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 453 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 859 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:16,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 1598 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1987 Invalid, 0 Unknown, 859 Unchecked, 0.8s Time] [2021-12-07 01:25:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-12-07 01:25:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1728. [2021-12-07 01:25:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1526 states have (on average 1.3034076015727392) internal successors, (1989), 1578 states have internal predecessors, (1989), 105 states have call successors, (105), 41 states have call predecessors, (105), 43 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2206 transitions. [2021-12-07 01:25:16,960 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2206 transitions. Word has length 142 [2021-12-07 01:25:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:16,960 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2206 transitions. [2021-12-07 01:25:16,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:25:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2206 transitions. [2021-12-07 01:25:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-07 01:25:16,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:16,961 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:16,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-07 01:25:17,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-07 01:25:17,162 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting l0_destroyErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2075666235, now seen corresponding path program 1 times [2021-12-07 01:25:17,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:17,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759109869] [2021-12-07 01:25:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:17,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:17,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:17,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182580458] [2021-12-07 01:25:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:17,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:17,193 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:17,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-07 01:25:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:17,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:25:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:25:17,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:25:17,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:17,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759109869] [2021-12-07 01:25:17,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:17,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182580458] [2021-12-07 01:25:17,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182580458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:25:17,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:17,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:25:17,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69706102] [2021-12-07 01:25:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:25:17,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:25:17,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:25:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:25:17,660 INFO L87 Difference]: Start difference. First operand 1728 states and 2206 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:17,686 INFO L93 Difference]: Finished difference Result 1754 states and 2184 transitions. [2021-12-07 01:25:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:25:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 143 [2021-12-07 01:25:17,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:17,688 INFO L225 Difference]: With dead ends: 1754 [2021-12-07 01:25:17,688 INFO L226 Difference]: Without dead ends: 1754 [2021-12-07 01:25:17,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:25:17,689 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 295 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:17,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 917 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:25:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-12-07 01:25:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1722. [2021-12-07 01:25:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1520 states have (on average 1.294078947368421) internal successors, (1967), 1572 states have internal predecessors, (1967), 105 states have call successors, (105), 41 states have call predecessors, (105), 43 states have return successors, (112), 108 states have call predecessors, (112), 105 states have call successors, (112) [2021-12-07 01:25:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2184 transitions. [2021-12-07 01:25:17,705 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2184 transitions. Word has length 143 [2021-12-07 01:25:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:17,705 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 2184 transitions. [2021-12-07 01:25:17,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:25:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2184 transitions. [2021-12-07 01:25:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-07 01:25:17,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:17,706 INFO L514 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:17,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-07 01:25:17,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-07 01:25:17,907 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting l0_destroyErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:25:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2075670428, now seen corresponding path program 1 times [2021-12-07 01:25:17,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:17,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893039559] [2021-12-07 01:25:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:17,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:17,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:17,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532387996] [2021-12-07 01:25:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:17,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:17,982 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:17,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-07 01:25:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-07 01:25:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:18,581 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:25:18,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:25:19,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-07 01:25:19,301 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 01:25:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 01:25:19,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 01:25:19,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:25:19,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-07 01:25:19,422 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-07 01:25:19,422 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-12-07 01:25:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-07 01:25:19,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:19,519 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 84 treesize of output 80 [2021-12-07 01:25:29,692 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:25:54,287 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-12-07 01:25:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 69100 treesize of output 66248 [2021-12-07 01:25:57,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893039559] [2021-12-07 01:25:57,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532387996] [2021-12-07 01:25:57,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-07 01:25:57,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:25:57,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-07 01:25:57,182 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-07 01:25:57,182 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-07 01:25:57,187 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr2REQUIRES_VIOLATION (88 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (87 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (86 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (85 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (84 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (83 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (82 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (81 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (80 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (79 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (78 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (77 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (76 of 89 remaining) [2021-12-07 01:25:57,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (75 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (74 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (73 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (72 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (71 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (70 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (69 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (68 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (67 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (66 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION (65 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION (64 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION (63 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (62 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (61 of 89 remaining) [2021-12-07 01:25:57,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (60 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (59 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION (58 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION (57 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION (56 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION (55 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION (54 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION (53 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION (52 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION (51 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION (50 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION (49 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (48 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION (47 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION (46 of 89 remaining) [2021-12-07 01:25:57,191 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION (45 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION (44 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION (43 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION (42 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION (41 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION (40 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_LEAK (39 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr0REQUIRES_VIOLATION (38 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr1REQUIRES_VIOLATION (37 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr3REQUIRES_VIOLATION (36 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr4REQUIRES_VIOLATION (35 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr5REQUIRES_VIOLATION (34 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr6REQUIRES_VIOLATION (33 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr7REQUIRES_VIOLATION (32 of 89 remaining) [2021-12-07 01:25:57,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr8REQUIRES_VIOLATION (31 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr9REQUIRES_VIOLATION (30 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr10ASSERT_VIOLATIONMEMORY_FREE (29 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr11ASSERT_VIOLATIONMEMORY_FREE (28 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr12ASSERT_VIOLATIONMEMORY_FREE (27 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr13REQUIRES_VIOLATION (26 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr14REQUIRES_VIOLATION (25 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr15ASSERT_VIOLATIONMEMORY_FREE (24 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr16ASSERT_VIOLATIONMEMORY_FREE (23 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr17ASSERT_VIOLATIONMEMORY_FREE (22 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr18REQUIRES_VIOLATION (21 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr19REQUIRES_VIOLATION (20 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr20ASSERT_VIOLATIONMEMORY_FREE (19 of 89 remaining) [2021-12-07 01:25:57,193 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr21ASSERT_VIOLATIONMEMORY_FREE (18 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr22ASSERT_VIOLATIONMEMORY_FREE (17 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr23REQUIRES_VIOLATION (16 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr24REQUIRES_VIOLATION (15 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr25ASSERT_VIOLATIONMEMORY_FREE (14 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr26ASSERT_VIOLATIONMEMORY_FREE (13 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr27ASSERT_VIOLATIONMEMORY_FREE (12 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr28REQUIRES_VIOLATION (11 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr29REQUIRES_VIOLATION (10 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr30ASSERT_VIOLATIONMEMORY_FREE (9 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr31ASSERT_VIOLATIONMEMORY_FREE (8 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr32ASSERT_VIOLATIONMEMORY_FREE (7 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr33REQUIRES_VIOLATION (6 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr34REQUIRES_VIOLATION (5 of 89 remaining) [2021-12-07 01:25:57,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr35ASSERT_VIOLATIONMEMORY_FREE (4 of 89 remaining) [2021-12-07 01:25:57,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr36ASSERT_VIOLATIONMEMORY_FREE (3 of 89 remaining) [2021-12-07 01:25:57,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location l0_destroyErr37ASSERT_VIOLATIONMEMORY_FREE (2 of 89 remaining) [2021-12-07 01:25:57,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE (1 of 89 remaining) [2021-12-07 01:25:57,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE (0 of 89 remaining) [2021-12-07 01:25:57,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-07 01:25:57,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-07 01:25:57,400 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:57,403 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 01:25:57,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:25:57 BoogieIcfgContainer [2021-12-07 01:25:57,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 01:25:57,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 01:25:57,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 01:25:57,434 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 01:25:57,435 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:22:23" (3/4) ... [2021-12-07 01:25:57,438 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-07 01:25:57,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 01:25:57,438 INFO L158 Benchmark]: Toolchain (without parser) took 214847.03ms. Allocated memory was 96.5MB in the beginning and 507.5MB in the end (delta: 411.0MB). Free memory was 60.3MB in the beginning and 324.6MB in the end (delta: -264.2MB). Peak memory consumption was 147.6MB. Max. memory is 16.1GB. [2021-12-07 01:25:57,438 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 96.5MB. Free memory was 70.0MB in the beginning and 70.0MB in the end (delta: 32.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:25:57,438 INFO L158 Benchmark]: CACSL2BoogieTranslator took 357.10ms. Allocated memory is still 96.5MB. Free memory was 60.1MB in the beginning and 59.7MB in the end (delta: 482.0kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 01:25:57,438 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.36ms. Allocated memory is still 96.5MB. Free memory was 59.7MB in the beginning and 56.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:25:57,439 INFO L158 Benchmark]: Boogie Preprocessor took 41.87ms. Allocated memory is still 96.5MB. Free memory was 56.7MB in the beginning and 54.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:25:57,439 INFO L158 Benchmark]: RCFGBuilder took 524.91ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 54.3MB in the beginning and 80.7MB in the end (delta: -26.4MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. [2021-12-07 01:25:57,439 INFO L158 Benchmark]: TraceAbstraction took 213857.63ms. Allocated memory was 123.7MB in the beginning and 507.5MB in the end (delta: 383.8MB). Free memory was 79.7MB in the beginning and 325.6MB in the end (delta: -245.9MB). Peak memory consumption was 408.2MB. Max. memory is 16.1GB. [2021-12-07 01:25:57,439 INFO L158 Benchmark]: Witness Printer took 3.67ms. Allocated memory is still 507.5MB. Free memory was 325.6MB in the beginning and 324.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:25:57,440 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 96.5MB. Free memory was 70.0MB in the beginning and 70.0MB in the end (delta: 32.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 357.10ms. Allocated memory is still 96.5MB. Free memory was 60.1MB in the beginning and 59.7MB in the end (delta: 482.0kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.36ms. Allocated memory is still 96.5MB. Free memory was 59.7MB in the beginning and 56.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.87ms. Allocated memory is still 96.5MB. Free memory was 56.7MB in the beginning and 54.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 524.91ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 54.3MB in the beginning and 80.7MB in the end (delta: -26.4MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. * TraceAbstraction took 213857.63ms. Allocated memory was 123.7MB in the beginning and 507.5MB in the end (delta: 383.8MB). Free memory was 79.7MB in the beginning and 325.6MB in the end (delta: -245.9MB). Peak memory consumption was 408.2MB. Max. memory is 16.1GB. * Witness Printer took 3.67ms. Allocated memory is still 507.5MB. Free memory was 325.6MB in the beginning and 324.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 755]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L777] static struct L0 *list; [L779] CALL l0_insert(&list) [L708] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L708] RET, EXPR zalloc_or_die(sizeof *item) [L708] struct L0 *item = zalloc_or_die(sizeof *item); [L710] CALL l1_insert(&item->down) [L699] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L699] RET, EXPR zalloc_or_die(sizeof *item) [L699] struct L1 *item = zalloc_or_die(sizeof *item); [L701] CALL l2_insert(&item->down) [L690] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L690] RET, EXPR zalloc_or_die(sizeof *item) [L690] struct L2 *item = zalloc_or_die(sizeof *item); [L692] CALL l3_insert(&item->down) [L681] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L681] RET, EXPR zalloc_or_die(sizeof *item) [L681] struct L3 *item = zalloc_or_die(sizeof *item); [L683] CALL l4_insert(&item->down) [L674] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L674] RET, EXPR zalloc_or_die(sizeof *item) [L674] struct L4 *item = zalloc_or_die(sizeof *item); [L675] CALL, EXPR zalloc_or_die(119U) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L675] RET, EXPR zalloc_or_die(119U) [L675] item->down = zalloc_or_die(119U) [L676] EXPR \read(**list) [L676] item->next = *list [L677] *list = item [L683] RET l4_insert(&item->down) [L684] COND FALSE !(__VERIFIER_nondet_int()) [L685] EXPR \read(**list) [L685] item->next = *list [L686] *list = item [L692] RET l3_insert(&item->down) [L693] COND FALSE !(__VERIFIER_nondet_int()) [L694] EXPR \read(**list) [L694] item->next = *list [L695] *list = item [L701] RET l2_insert(&item->down) [L702] COND FALSE !(__VERIFIER_nondet_int()) [L703] EXPR \read(**list) [L703] item->next = *list [L704] *list = item [L710] RET l1_insert(&item->down) [L711] COND FALSE !(__VERIFIER_nondet_int()) [L712] EXPR \read(**list) [L712] item->next = *list [L713] *list = item [L779] RET l0_insert(&list) [L780] COND FALSE !(__VERIFIER_nondet_int()) [L781] EXPR \read(*list) [L781] CALL l0_destroy(list, 5) [L766] COND TRUE 0 < level [L767] EXPR list->down [L767] CALL l1_destroy(list->down, level) [L754] COND TRUE 1 < level [L755] list->down - UnprovableResult [Line: 675]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 675]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 677]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 677]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 686]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 686]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 781]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 781]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 783]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 783]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 786]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 786]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 787]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 787]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 775]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 755]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 743]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 743]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 731]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 731]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 720]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 720]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 722]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 722]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 722]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 732]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 732]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 734]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 734]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 734]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 744]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 744]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 746]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 746]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 746]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 756]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 756]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 758]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 758]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 758]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 243 locations, 89 error locations. Started 1 CEGAR loops. OverallTime: 213.8s, OverallIterations: 49, TraceHistogramMax: 36, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 54.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9554 SdHoareTripleChecker+Valid, 19.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9417 mSDsluCounter, 59524 SdHoareTripleChecker+Invalid, 15.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 34181 IncrementalHoareTripleChecker+Unchecked, 49039 mSDsCounter, 945 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26921 IncrementalHoareTripleChecker+Invalid, 62047 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 945 mSolverCounterUnsat, 10485 mSDtfsCounter, 26921 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6308 GetRequests, 5411 SyntacticMatches, 81 SemanticMatches, 816 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 62.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1731occurred in iteration=45, InterpolantAutomatonStates: 547, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 48 MinimizatonAttempts, 3560 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 133.3s InterpolantComputationTime, 5017 NumberOfCodeBlocks, 4824 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 5915 ConstructedInterpolants, 1127 QuantifiedInterpolants, 42126 SizeOfPredicates, 697 NumberOfNonLiveVariables, 40575 ConjunctsInSsa, 2285 ConjunctsInUnsatCore, 59 InterpolantComputations, 20 PerfectInterpolantSequences, 20659/24637 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-07 01:25:57,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/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_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:25:59,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:25:59,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:25:59,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:25:59,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:25:59,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:25:59,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:25:59,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:25:59,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:25:59,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:25:59,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:25:59,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:25:59,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:25:59,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:25:59,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:25:59,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:25:59,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:25:59,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:25:59,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:25:59,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:25:59,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:25:59,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:25:59,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:25:59,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:25:59,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:25:59,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:25:59,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:25:59,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:25:59,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:25:59,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:25:59,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:25:59,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:25:59,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:25:59,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:25:59,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:25:59,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:25:59,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:25:59,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:25:59,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:25:59,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:25:59,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:25:59,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-07 01:25:59,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:25:59,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:25:59,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:25:59,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:25:59,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:25:59,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:25:59,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:25:59,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:25:59,123 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:25:59,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:25:59,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:25:59,124 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:25:59,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:25:59,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:25:59,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:25:59,125 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:25:59,125 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:25:59,125 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:25:59,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:25:59,125 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:25:59,126 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:25:59,126 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:25:59,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:25:59,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:25:59,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:25:59,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:25:59,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:25:59,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:25:59,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:25:59,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:25:59,128 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:25:59,128 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:25:59,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:25:59,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:25:59,128 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2021-12-07 01:25:59,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:25:59,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:25:59,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:25:59,370 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:25:59,370 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:25:59,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety/test-0235-3.i [2021-12-07 01:25:59,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/1a5030542/32b2578372a5490e83999e0425985722/FLAG58c5b2f21 [2021-12-07 01:25:59,868 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:25:59,868 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/sv-benchmarks/c/memsafety/test-0235-3.i [2021-12-07 01:25:59,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/1a5030542/32b2578372a5490e83999e0425985722/FLAG58c5b2f21 [2021-12-07 01:26:00,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/data/1a5030542/32b2578372a5490e83999e0425985722 [2021-12-07 01:26:00,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:26:00,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:26:00,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:26:00,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:26:00,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:26:00,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222f8c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00, skipping insertion in model container [2021-12-07 01:26:00,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:26:00,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:26:00,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:26:00,684 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:26:00,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:26:00,756 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:26:00,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00 WrapperNode [2021-12-07 01:26:00,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:26:00,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:26:00,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:26:00,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:26:00,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,803 INFO L137 Inliner]: procedures = 189, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 236 [2021-12-07 01:26:00,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:26:00,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:26:00,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:26:00,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:26:00,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:26:00,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:26:00,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:26:00,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:26:00,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (1/1) ... [2021-12-07 01:26:00,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:26:00,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:26:00,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:26:00,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:26:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:26:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:26:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:26:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:26:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-07 01:26:00,890 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-07 01:26:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:26:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:26:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 01:26:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2021-12-07 01:26:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2021-12-07 01:26:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:26:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:26:01,005 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:26:01,006 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:26:01,601 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:26:01,610 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:26:01,610 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-07 01:26:01,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:26:01 BoogieIcfgContainer [2021-12-07 01:26:01,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:26:01,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:26:01,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:26:01,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:26:01,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:26:00" (1/3) ... [2021-12-07 01:26:01,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6001f01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:26:01, skipping insertion in model container [2021-12-07 01:26:01,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:26:00" (2/3) ... [2021-12-07 01:26:01,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6001f01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:26:01, skipping insertion in model container [2021-12-07 01:26:01,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:26:01" (3/3) ... [2021-12-07 01:26:01,620 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2021-12-07 01:26:01,625 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:26:01,625 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2021-12-07 01:26:01,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:26:01,675 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 [2021-12-07 01:26:01,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2021-12-07 01:26:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 133 states have (on average 1.9097744360902256) internal successors, (254), 222 states have internal predecessors, (254), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-07 01:26:01,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:01,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-07 01:26:01,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash 929958, now seen corresponding path program 1 times [2021-12-07 01:26:01,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:01,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512174597] [2021-12-07 01:26:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:01,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:01,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:01,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:01,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:26:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:01,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 01:26:01,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:26:01,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:26:01,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512174597] [2021-12-07 01:26:01,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512174597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:26:01,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:26:01,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:26:01,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623460734] [2021-12-07 01:26:01,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:26:01,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:26:01,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:26:01,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:26:01,815 INFO L87 Difference]: Start difference. First operand has 238 states, 133 states have (on average 1.9097744360902256) internal successors, (254), 222 states have internal predecessors, (254), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:26:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:01,848 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2021-12-07 01:26:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:26:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-07 01:26:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:01,857 INFO L225 Difference]: With dead ends: 238 [2021-12-07 01:26:01,858 INFO L226 Difference]: Without dead ends: 236 [2021-12-07 01:26:01,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:26:01,862 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:01,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:26:01,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-07 01:26:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-12-07 01:26:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 220 states have internal predecessors, (241), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 267 transitions. [2021-12-07 01:26:01,918 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 267 transitions. Word has length 4 [2021-12-07 01:26:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:01,919 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 267 transitions. [2021-12-07 01:26:01,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:26:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 267 transitions. [2021-12-07 01:26:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:26:01,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:01,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:26:01,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:26:02,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:02,121 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash 889937946, now seen corresponding path program 1 times [2021-12-07 01:26:02,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471403792] [2021-12-07 01:26:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:02,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:02,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:02,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:02,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:26:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:26:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:02,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:26:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:26:02,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:26:02,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:02,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471403792] [2021-12-07 01:26:02,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471403792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:26:02,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:26:02,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:26:02,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167570319] [2021-12-07 01:26:02,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:26:02,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:26:02,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:26:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:26:02,284 INFO L87 Difference]: Start difference. First operand 236 states and 267 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:26:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:02,541 INFO L93 Difference]: Finished difference Result 235 states and 266 transitions. [2021-12-07 01:26:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:26:02,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 01:26:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:02,545 INFO L225 Difference]: With dead ends: 235 [2021-12-07 01:26:02,545 INFO L226 Difference]: Without dead ends: 235 [2021-12-07 01:26:02,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:26:02,547 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 9 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:02,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 428 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:26:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-07 01:26:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-07 01:26:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 132 states have (on average 1.8181818181818181) internal successors, (240), 219 states have internal predecessors, (240), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 266 transitions. [2021-12-07 01:26:02,571 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 266 transitions. Word has length 6 [2021-12-07 01:26:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:02,571 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 266 transitions. [2021-12-07 01:26:02,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:26:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 266 transitions. [2021-12-07 01:26:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:26:02,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:02,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:02,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-07 01:26:02,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:02,774 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1818272976, now seen corresponding path program 1 times [2021-12-07 01:26:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:02,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926701735] [2021-12-07 01:26:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:02,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:02,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:02,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:26:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:26:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:02,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:26:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:26:02,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:26:02,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:02,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926701735] [2021-12-07 01:26:02,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926701735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:26:02,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:26:02,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:26:02,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782256095] [2021-12-07 01:26:02,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:26:02,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:26:02,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:26:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:26:02,934 INFO L87 Difference]: Start difference. First operand 235 states and 266 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:26:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:03,262 INFO L93 Difference]: Finished difference Result 244 states and 275 transitions. [2021-12-07 01:26:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:26:03,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 01:26:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:03,265 INFO L225 Difference]: With dead ends: 244 [2021-12-07 01:26:03,265 INFO L226 Difference]: Without dead ends: 244 [2021-12-07 01:26:03,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:26:03,266 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 16 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:03,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 694 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:26:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-07 01:26:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-12-07 01:26:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 140 states have (on average 1.7785714285714285) internal successors, (249), 227 states have internal predecessors, (249), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 275 transitions. [2021-12-07 01:26:03,280 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 275 transitions. Word has length 7 [2021-12-07 01:26:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:03,280 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 275 transitions. [2021-12-07 01:26:03,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:26:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 275 transitions. [2021-12-07 01:26:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 01:26:03,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:03,282 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:03,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 01:26:03,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:03,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:03,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1632464615, now seen corresponding path program 1 times [2021-12-07 01:26:03,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332884006] [2021-12-07 01:26:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:03,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:03,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:03,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:03,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:26:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:26:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:26:03,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:26:03,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:03,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332884006] [2021-12-07 01:26:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332884006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:26:03,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:26:03,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:26:03,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312723731] [2021-12-07 01:26:03,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:26:03,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:26:03,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:26:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:26:03,813 INFO L87 Difference]: Start difference. First operand 244 states and 275 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:26:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:03,890 INFO L93 Difference]: Finished difference Result 256 states and 287 transitions. [2021-12-07 01:26:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:26:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2021-12-07 01:26:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:03,893 INFO L225 Difference]: With dead ends: 256 [2021-12-07 01:26:03,893 INFO L226 Difference]: Without dead ends: 246 [2021-12-07 01:26:03,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:26:03,894 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 13 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:03,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 998 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:26:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-07 01:26:03,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-12-07 01:26:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 142 states have (on average 1.767605633802817) internal successors, (251), 229 states have internal predecessors, (251), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 277 transitions. [2021-12-07 01:26:03,910 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 277 transitions. Word has length 66 [2021-12-07 01:26:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:03,911 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 277 transitions. [2021-12-07 01:26:03,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:26:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 277 transitions. [2021-12-07 01:26:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 01:26:03,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:03,914 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:03,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 01:26:04,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:04,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1536774091, now seen corresponding path program 1 times [2021-12-07 01:26:04,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:04,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31876213] [2021-12-07 01:26:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:04,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:04,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:04,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:04,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:26:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:26:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-07 01:26:04,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 01:26:04,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:04,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31876213] [2021-12-07 01:26:04,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31876213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:04,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:04,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-07 01:26:04,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568150348] [2021-12-07 01:26:04,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:04,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:26:04,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:26:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:26:04,646 INFO L87 Difference]: Start difference. First operand 246 states and 277 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 01:26:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:04,867 INFO L93 Difference]: Finished difference Result 265 states and 297 transitions. [2021-12-07 01:26:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:26:04,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-12-07 01:26:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:04,870 INFO L225 Difference]: With dead ends: 265 [2021-12-07 01:26:04,870 INFO L226 Difference]: Without dead ends: 250 [2021-12-07 01:26:04,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:26:04,871 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 57 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:04,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1258 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:26:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-07 01:26:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2021-12-07 01:26:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.7465753424657535) internal successors, (255), 233 states have internal predecessors, (255), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2021-12-07 01:26:04,879 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 71 [2021-12-07 01:26:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:04,880 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2021-12-07 01:26:04,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 01:26:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2021-12-07 01:26:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-07 01:26:04,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:04,881 INFO L514 BasicCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:04,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:26:05,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:05,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:05,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1330470809, now seen corresponding path program 2 times [2021-12-07 01:26:05,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244560483] [2021-12-07 01:26:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:26:05,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:05,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:05,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:26:05,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:26:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:26:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:26:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:05,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:26:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-07 01:26:05,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:26:05,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:05,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244560483] [2021-12-07 01:26:05,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244560483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:26:05,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:26:05,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:26:05,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630818137] [2021-12-07 01:26:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:26:05,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:26:05,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:26:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:26:05,467 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:26:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:05,473 INFO L93 Difference]: Finished difference Result 249 states and 280 transitions. [2021-12-07 01:26:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:26:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 86 [2021-12-07 01:26:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:05,476 INFO L225 Difference]: With dead ends: 249 [2021-12-07 01:26:05,476 INFO L226 Difference]: Without dead ends: 249 [2021-12-07 01:26:05,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:26:05,477 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:05,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 453 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2021-12-07 01:26:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-07 01:26:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-12-07 01:26:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 146 states have (on average 1.7397260273972603) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2021-12-07 01:26:05,486 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 86 [2021-12-07 01:26:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:05,487 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2021-12-07 01:26:05,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:26:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2021-12-07 01:26:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 01:26:05,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:05,489 INFO L514 BasicCegarLoop]: trace histogram [22, 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, 1, 1, 1, 1, 1] [2021-12-07 01:26:05,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-07 01:26:05,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:05,690 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash -253544918, now seen corresponding path program 1 times [2021-12-07 01:26:05,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:05,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637081793] [2021-12-07 01:26:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:05,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:05,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:05,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 01:26:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:26:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 155 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-07 01:26:06,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-07 01:26:06,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637081793] [2021-12-07 01:26:06,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637081793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:06,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:06,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-07 01:26:06,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478995109] [2021-12-07 01:26:06,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:06,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:26:06,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:26:06,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:26:06,457 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-07 01:26:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:07,021 INFO L93 Difference]: Finished difference Result 281 states and 314 transitions. [2021-12-07 01:26:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:26:07,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 95 [2021-12-07 01:26:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:07,024 INFO L225 Difference]: With dead ends: 281 [2021-12-07 01:26:07,024 INFO L226 Difference]: Without dead ends: 256 [2021-12-07 01:26:07,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:26:07,025 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 82 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:07,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 2306 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:26:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-07 01:26:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-12-07 01:26:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 239 states have internal predecessors, (261), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 287 transitions. [2021-12-07 01:26:07,032 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 287 transitions. Word has length 95 [2021-12-07 01:26:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:07,032 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 287 transitions. [2021-12-07 01:26:07,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-07 01:26:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 287 transitions. [2021-12-07 01:26:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:26:07,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:07,034 INFO L514 BasicCegarLoop]: trace histogram [45, 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, 1, 1, 1, 1, 1] [2021-12-07 01:26:07,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 01:26:07,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:07,235 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:07,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:07,237 INFO L85 PathProgramCache]: Analyzing trace with hash -832189974, now seen corresponding path program 2 times [2021-12-07 01:26:07,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:07,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638114038] [2021-12-07 01:26:07,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:26:07,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:07,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:07,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 01:26:08,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:26:08,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:26:08,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 01:26:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:26:08,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:26:08,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:08,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638114038] [2021-12-07 01:26:08,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638114038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:08,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:08,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-07 01:26:08,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788191054] [2021-12-07 01:26:08,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:08,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:26:08,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:26:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:26:08,832 INFO L87 Difference]: Start difference. First operand 256 states and 287 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:26:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:09,616 INFO L93 Difference]: Finished difference Result 273 states and 309 transitions. [2021-12-07 01:26:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:26:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 118 [2021-12-07 01:26:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:09,619 INFO L225 Difference]: With dead ends: 273 [2021-12-07 01:26:09,619 INFO L226 Difference]: Without dead ends: 263 [2021-12-07 01:26:09,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:26:09,620 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 118 mSDsluCounter, 2769 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:09,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 3028 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:26:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-07 01:26:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-07 01:26:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 160 states have (on average 1.675) internal successors, (268), 246 states have internal predecessors, (268), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 294 transitions. [2021-12-07 01:26:09,631 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 294 transitions. Word has length 118 [2021-12-07 01:26:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:09,632 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 294 transitions. [2021-12-07 01:26:09,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:26:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 294 transitions. [2021-12-07 01:26:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:26:09,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:09,635 INFO L514 BasicCegarLoop]: trace histogram [52, 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, 1, 1, 1, 1, 1] [2021-12-07 01:26:09,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 01:26:09,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:09,836 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash 584367274, now seen corresponding path program 3 times [2021-12-07 01:26:09,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:09,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332197586] [2021-12-07 01:26:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:26:09,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:09,839 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:09,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 01:26:10,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:26:10,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:26:10,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:26:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:10,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:26:10,374 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:26:10,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 01:26:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-12-07 01:26:10,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-12-07 01:26:10,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332197586] [2021-12-07 01:26:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332197586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:10,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:10,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-12-07 01:26:10,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687055958] [2021-12-07 01:26:10,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:10,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:26:10,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:26:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:26:10,768 INFO L87 Difference]: Start difference. First operand 263 states and 294 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:26:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:11,728 INFO L93 Difference]: Finished difference Result 408 states and 475 transitions. [2021-12-07 01:26:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:26:11,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 125 [2021-12-07 01:26:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:11,732 INFO L225 Difference]: With dead ends: 408 [2021-12-07 01:26:11,732 INFO L226 Difference]: Without dead ends: 408 [2021-12-07 01:26:11,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 230 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:26:11,733 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 214 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:11,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1525 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 846 Invalid, 0 Unknown, 206 Unchecked, 0.9s Time] [2021-12-07 01:26:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-07 01:26:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 261. [2021-12-07 01:26:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 160 states have (on average 1.6625) internal successors, (266), 244 states have internal predecessors, (266), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 292 transitions. [2021-12-07 01:26:11,743 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 292 transitions. Word has length 125 [2021-12-07 01:26:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:11,743 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 292 transitions. [2021-12-07 01:26:11,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:26:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 292 transitions. [2021-12-07 01:26:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:26:11,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:11,745 INFO L514 BasicCegarLoop]: trace histogram [52, 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, 1, 1, 1, 1, 1] [2021-12-07 01:26:11,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 01:26:11,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:11,946 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:11,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash 584367275, now seen corresponding path program 1 times [2021-12-07 01:26:11,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:11,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679791179] [2021-12-07 01:26:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:11,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:11,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:11,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 01:26:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 01:26:13,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:26:13,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:26:14,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679791179] [2021-12-07 01:26:14,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679791179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:14,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:14,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-12-07 01:26:14,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989536292] [2021-12-07 01:26:14,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:14,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:26:14,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:26:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:26:14,371 INFO L87 Difference]: Start difference. First operand 261 states and 292 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:26:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:17,578 INFO L93 Difference]: Finished difference Result 309 states and 371 transitions. [2021-12-07 01:26:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 01:26:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 125 [2021-12-07 01:26:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:17,580 INFO L225 Difference]: With dead ends: 309 [2021-12-07 01:26:17,581 INFO L226 Difference]: Without dead ends: 299 [2021-12-07 01:26:17,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1195, Invalid=2345, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 01:26:17,582 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 386 mSDsluCounter, 3710 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 3979 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:17,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 3979 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-07 01:26:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-07 01:26:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 279. [2021-12-07 01:26:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 178 states have (on average 1.6123595505617978) internal successors, (287), 262 states have internal predecessors, (287), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 313 transitions. [2021-12-07 01:26:17,590 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 313 transitions. Word has length 125 [2021-12-07 01:26:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:17,591 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 313 transitions. [2021-12-07 01:26:17,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:26:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 313 transitions. [2021-12-07 01:26:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-07 01:26:17,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:17,592 INFO L514 BasicCegarLoop]: trace histogram [66, 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, 1, 1, 1, 1, 1] [2021-12-07 01:26:17,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-07 01:26:17,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:17,794 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash 652367019, now seen corresponding path program 2 times [2021-12-07 01:26:17,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:17,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345317348] [2021-12-07 01:26:17,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:26:17,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:17,801 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:17,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 01:26:18,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:26:18,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:26:18,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 01:26:18,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:26:19,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:26:22,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:22,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345317348] [2021-12-07 01:26:22,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345317348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:22,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-12-07 01:26:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603002103] [2021-12-07 01:26:22,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:22,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-07 01:26:22,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-07 01:26:22,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=2582, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 01:26:22,213 INFO L87 Difference]: Start difference. First operand 279 states and 313 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:26:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:37,621 INFO L93 Difference]: Finished difference Result 337 states and 413 transitions. [2021-12-07 01:26:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-07 01:26:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 139 [2021-12-07 01:26:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:37,624 INFO L225 Difference]: With dead ends: 337 [2021-12-07 01:26:37,624 INFO L226 Difference]: Without dead ends: 327 [2021-12-07 01:26:37,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3526, Invalid=6980, Unknown=0, NotChecked=0, Total=10506 [2021-12-07 01:26:37,627 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 1140 mSDsluCounter, 8292 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 8565 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:37,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 8565 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-07 01:26:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-07 01:26:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 307. [2021-12-07 01:26:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 206 states have (on average 1.529126213592233) internal successors, (315), 290 states have internal predecessors, (315), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 341 transitions. [2021-12-07 01:26:37,635 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 341 transitions. Word has length 139 [2021-12-07 01:26:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:37,636 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 341 transitions. [2021-12-07 01:26:37,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:26:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 341 transitions. [2021-12-07 01:26:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-07 01:26:37,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:37,637 INFO L514 BasicCegarLoop]: trace histogram [94, 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, 1, 1, 1, 1, 1] [2021-12-07 01:26:37,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-07 01:26:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:37,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash -444627797, now seen corresponding path program 3 times [2021-12-07 01:26:37,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:37,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169782030] [2021-12-07 01:26:37,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:26:37,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:37,845 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:37,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 01:26:38,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:26:38,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:26:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 01:26:38,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:41,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:41,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:26:41,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:26:41,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-12-07 01:26:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 502 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2021-12-07 01:26:41,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:41,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:26:41,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169782030] [2021-12-07 01:26:41,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169782030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:26:41,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1747218354] [2021-12-07 01:26:41,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:26:41,595 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:26:41,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:26:41,596 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:26:41,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-07 01:26:42,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:26:42,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:26:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 01:26:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:42,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:26:43,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:43,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:26:43,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:26:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-07 01:26:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 502 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2021-12-07 01:26:43,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:43,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1747218354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:26:43,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:43,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-07 01:26:43,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466203395] [2021-12-07 01:26:43,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:43,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:26:43,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:26:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:26:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=404, Unknown=1, NotChecked=0, Total=462 [2021-12-07 01:26:43,318 INFO L87 Difference]: Start difference. First operand 307 states and 341 transitions. Second operand has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-07 01:26:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:48,029 INFO L93 Difference]: Finished difference Result 452 states and 522 transitions. [2021-12-07 01:26:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:26:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 167 [2021-12-07 01:26:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:48,032 INFO L225 Difference]: With dead ends: 452 [2021-12-07 01:26:48,032 INFO L226 Difference]: Without dead ends: 452 [2021-12-07 01:26:48,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=91, Invalid=664, Unknown=1, NotChecked=0, Total=756 [2021-12-07 01:26:48,033 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 430 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:48,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 729 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2600 Invalid, 0 Unknown, 371 Unchecked, 4.4s Time] [2021-12-07 01:26:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-12-07 01:26:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 305. [2021-12-07 01:26:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 206 states have (on average 1.5194174757281553) internal successors, (313), 288 states have internal predecessors, (313), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:26:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 339 transitions. [2021-12-07 01:26:48,041 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 339 transitions. Word has length 167 [2021-12-07 01:26:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:48,042 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 339 transitions. [2021-12-07 01:26:48,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-07 01:26:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 339 transitions. [2021-12-07 01:26:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-07 01:26:48,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:48,043 INFO L514 BasicCegarLoop]: trace histogram [94, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:48,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-07 01:26:48,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-07 01:26:48,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:26:48,445 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:26:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2085551349, now seen corresponding path program 1 times [2021-12-07 01:26:48,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:26:48,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566757333] [2021-12-07 01:26:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:48,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:26:48,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:26:48,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:26:48,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 01:26:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:49,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:26:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:26:51,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:27:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:27:00,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:27:00,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566757333] [2021-12-07 01:27:00,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566757333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:27:00,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:27:00,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2021-12-07 01:27:00,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013794637] [2021-12-07 01:27:00,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:27:00,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-07 01:27:00,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:27:00,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-07 01:27:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=9862, Unknown=0, NotChecked=0, Total=13340 [2021-12-07 01:27:00,204 INFO L87 Difference]: Start difference. First operand 305 states and 339 transitions. Second operand has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:28:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:28:30,019 INFO L93 Difference]: Finished difference Result 391 states and 495 transitions. [2021-12-07 01:28:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-07 01:28:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 169 [2021-12-07 01:28:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:28:30,022 INFO L225 Difference]: With dead ends: 391 [2021-12-07 01:28:30,023 INFO L226 Difference]: Without dead ends: 381 [2021-12-07 01:28:30,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6550 ImplicationChecksByTransitivity, 82.9s TimeCoverageRelationStatistics Valid=11646, Invalid=23136, Unknown=0, NotChecked=0, Total=34782 [2021-12-07 01:28:30,031 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 3029 mSDsluCounter, 15310 mSDsCounter, 0 mSdLazyCounter, 5545 mSolverCounterSat, 1948 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3029 SdHoareTripleChecker+Valid, 15581 SdHoareTripleChecker+Invalid, 7493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1948 IncrementalHoareTripleChecker+Valid, 5545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:28:30,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3029 Valid, 15581 Invalid, 7493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1948 Valid, 5545 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2021-12-07 01:28:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-07 01:28:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 361. [2021-12-07 01:28:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 262 states have (on average 1.4083969465648856) internal successors, (369), 344 states have internal predecessors, (369), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:28:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 395 transitions. [2021-12-07 01:28:30,039 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 395 transitions. Word has length 169 [2021-12-07 01:28:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:28:30,039 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 395 transitions. [2021-12-07 01:28:30,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:28:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 395 transitions. [2021-12-07 01:28:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-07 01:28:30,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:28:30,041 INFO L514 BasicCegarLoop]: trace histogram [150, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:28:30,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 01:28:30,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:28:30,241 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:28:30,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:28:30,242 INFO L85 PathProgramCache]: Analyzing trace with hash 500917003, now seen corresponding path program 2 times [2021-12-07 01:28:30,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:28:30,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085774385] [2021-12-07 01:28:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:28:30,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:28:30,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:28:30,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:28:30,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-07 01:28:32,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:28:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:28:32,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1997 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-07 01:28:32,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:28:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 5030 proven. 6105 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:28:38,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 5030 proven. 6105 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:29:02,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:29:02,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085774385] [2021-12-07 01:29:02,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085774385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:29:02,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:29:02,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 228 [2021-12-07 01:29:02,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582138009] [2021-12-07 01:29:02,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:02,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2021-12-07 01:29:02,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:29:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2021-12-07 01:29:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7969, Invalid=43787, Unknown=0, NotChecked=0, Total=51756 [2021-12-07 01:29:02,429 INFO L87 Difference]: Start difference. First operand 361 states and 395 transitions. Second operand has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:30:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:00,937 INFO L93 Difference]: Finished difference Result 400 states and 457 transitions. [2021-12-07 01:30:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-07 01:30:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 225 [2021-12-07 01:30:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:00,940 INFO L225 Difference]: With dead ends: 400 [2021-12-07 01:30:00,940 INFO L226 Difference]: Without dead ends: 390 [2021-12-07 01:30:00,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19225 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=10995, Invalid=52257, Unknown=0, NotChecked=0, Total=63252 [2021-12-07 01:30:00,944 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 1518 mSDsluCounter, 30910 mSDsCounter, 0 mSdLazyCounter, 16414 mSolverCounterSat, 1245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 31181 SdHoareTripleChecker+Invalid, 17659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1245 IncrementalHoareTripleChecker+Valid, 16414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:00,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 31181 Invalid, 17659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1245 Valid, 16414 Invalid, 0 Unknown, 0 Unchecked, 52.1s Time] [2021-12-07 01:30:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-07 01:30:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 370. [2021-12-07 01:30:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 271 states have (on average 1.3948339483394834) internal successors, (378), 353 states have internal predecessors, (378), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:30:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 404 transitions. [2021-12-07 01:30:00,954 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 404 transitions. Word has length 225 [2021-12-07 01:30:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:00,954 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 404 transitions. [2021-12-07 01:30:00,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:30:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 404 transitions. [2021-12-07 01:30:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-07 01:30:00,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:00,956 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:00,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-07 01:30:01,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:30:01,157 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:30:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash -481849269, now seen corresponding path program 3 times [2021-12-07 01:30:01,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:30:01,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540591915] [2021-12-07 01:30:01,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:30:01,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:30:01,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:30:01,166 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:30:01,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-07 01:30:01,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:30:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:30:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:30:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:02,100 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:30:02,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 01:30:03,080 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:30:03,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2021-12-07 01:30:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2262 refuted. 0 times theorem prover too weak. 7591 trivial. 0 not checked. [2021-12-07 01:30:03,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:30:03,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:30:03,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540591915] [2021-12-07 01:30:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540591915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:03,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [562252530] [2021-12-07 01:30:03,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:30:03,377 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:30:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:30:03,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:30:03,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-07 01:30:04,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:30:04,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:30:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:30:04,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:04,750 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:30:04,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-07 01:30:05,672 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:30:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-12-07 01:30:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2262 refuted. 0 times theorem prover too weak. 7591 trivial. 0 not checked. [2021-12-07 01:30:05,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:30:06,848 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:30:06,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:30:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 1175 refuted. 0 times theorem prover too weak. 8678 trivial. 0 not checked. [2021-12-07 01:30:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [562252530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:30:06,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:30:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 24 [2021-12-07 01:30:06,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825453048] [2021-12-07 01:30:06,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:30:06,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:30:06,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:30:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:30:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:30:06,886 INFO L87 Difference]: Start difference. First operand 370 states and 404 transitions. Second operand has 25 states, 23 states have (on average 3.217391304347826) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:30:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:08,431 INFO L93 Difference]: Finished difference Result 534 states and 577 transitions. [2021-12-07 01:30:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:30:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.217391304347826) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) Word has length 234 [2021-12-07 01:30:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:08,433 INFO L225 Difference]: With dead ends: 534 [2021-12-07 01:30:08,433 INFO L226 Difference]: Without dead ends: 534 [2021-12-07 01:30:08,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 664 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 01:30:08,434 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 212 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:08,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 2484 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 737 Invalid, 0 Unknown, 347 Unchecked, 1.1s Time] [2021-12-07 01:30:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-07 01:30:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 525. [2021-12-07 01:30:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 423 states have (on average 1.2647754137115839) internal successors, (535), 504 states have internal predecessors, (535), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 01:30:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 565 transitions. [2021-12-07 01:30:08,443 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 565 transitions. Word has length 234 [2021-12-07 01:30:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:08,443 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 565 transitions. [2021-12-07 01:30:08,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.217391304347826) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:30:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 565 transitions. [2021-12-07 01:30:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-07 01:30:08,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:08,447 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:08,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-07 01:30:08,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-07 01:30:08,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:30:08,849 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:30:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash -481849268, now seen corresponding path program 1 times [2021-12-07 01:30:08,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:30:08,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006266076] [2021-12-07 01:30:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:08,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:30:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:30:08,854 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:30:08,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 01:30:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:30:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:30:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:30:14,298 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:30:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-07 01:30:18,799 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:30:18,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:30:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:30:18,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:30:19,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:30:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006266076] [2021-12-07 01:30:19,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006266076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774789532] [2021-12-07 01:30:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:19,413 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:30:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:30:19,414 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:30:19,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-07 01:30:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 01:30:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:47,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:47,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:47,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:30:47,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:30:47,570 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:30:47,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-07 01:30:47,957 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:30:47,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:30:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:30:48,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:30:48,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774789532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:48,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:30:48,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-12-07 01:30:48,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733202627] [2021-12-07 01:30:48,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:30:48,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:30:48,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:30:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:30:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=229, Unknown=3, NotChecked=0, Total=272 [2021-12-07 01:30:48,363 INFO L87 Difference]: Start difference. First operand 525 states and 565 transitions. Second operand has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:30:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:50,689 INFO L93 Difference]: Finished difference Result 626 states and 686 transitions. [2021-12-07 01:30:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:30:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 234 [2021-12-07 01:30:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:50,692 INFO L225 Difference]: With dead ends: 626 [2021-12-07 01:30:50,692 INFO L226 Difference]: Without dead ends: 626 [2021-12-07 01:30:50,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 457 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=67, Invalid=392, Unknown=3, NotChecked=0, Total=462 [2021-12-07 01:30:50,693 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 336 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 921 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:50,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 817 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1581 Invalid, 0 Unknown, 921 Unchecked, 2.0s Time] [2021-12-07 01:30:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-12-07 01:30:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 525. [2021-12-07 01:30:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 423 states have (on average 1.2624113475177305) internal successors, (534), 504 states have internal predecessors, (534), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 01:30:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 564 transitions. [2021-12-07 01:30:50,702 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 564 transitions. Word has length 234 [2021-12-07 01:30:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:50,702 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 564 transitions. [2021-12-07 01:30:50,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:30:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 564 transitions. [2021-12-07 01:30:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-07 01:30:50,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:50,703 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:50,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-07 01:30:50,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-07 01:30:51,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:30:51,105 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:30:51,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash -990858526, now seen corresponding path program 1 times [2021-12-07 01:30:51,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:30:51,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780237657] [2021-12-07 01:30:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:51,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:30:51,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:30:51,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:30:51,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 01:30:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:30:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 264 proven. 1175 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:30:53,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:30:53,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 6 [2021-12-07 01:30:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 264 proven. 1175 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:30:54,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:30:54,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780237657] [2021-12-07 01:30:54,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780237657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:30:54,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:30:54,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:30:54,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848927135] [2021-12-07 01:30:54,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:30:54,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:30:54,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:30:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:30:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:30:54,021 INFO L87 Difference]: Start difference. First operand 525 states and 564 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:30:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:55,779 INFO L93 Difference]: Finished difference Result 543 states and 589 transitions. [2021-12-07 01:30:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:30:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 237 [2021-12-07 01:30:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:55,782 INFO L225 Difference]: With dead ends: 543 [2021-12-07 01:30:55,782 INFO L226 Difference]: Without dead ends: 543 [2021-12-07 01:30:55,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:30:55,783 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 438 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:55,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 2007 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-07 01:30:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-12-07 01:30:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 524. [2021-12-07 01:30:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 423 states have (on average 1.260047281323877) internal successors, (533), 503 states have internal predecessors, (533), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 01:30:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 563 transitions. [2021-12-07 01:30:55,794 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 563 transitions. Word has length 237 [2021-12-07 01:30:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:55,794 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 563 transitions. [2021-12-07 01:30:55,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:30:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 563 transitions. [2021-12-07 01:30:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-07 01:30:55,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:55,795 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:55,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-07 01:30:55,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:30:55,997 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:30:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash 643866552, now seen corresponding path program 1 times [2021-12-07 01:30:56,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:30:56,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194705661] [2021-12-07 01:30:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:56,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:30:56,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:30:56,005 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:30:56,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 01:30:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 01:30:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:59,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:59,363 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:30:59,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-07 01:30:59,642 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:30:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 29 [2021-12-07 01:31:02,526 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:31:02,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-12-07 01:31:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 2438 refuted. 1087 times theorem prover too weak. 7414 trivial. 0 not checked. [2021-12-07 01:31:02,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:31:02,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:31:02,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194705661] [2021-12-07 01:31:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194705661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:31:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887861857] [2021-12-07 01:31:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:02,960 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:31:02,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:31:02,960 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:31:02,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-07 01:31:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 01:31:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:31:23,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:31:23,252 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:31:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-07 01:31:23,424 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:31:23,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 01:31:26,274 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:31:26,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-12-07 01:31:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 1263 refuted. 2174 times theorem prover too weak. 7502 trivial. 0 not checked. [2021-12-07 01:31:26,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:31:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 1263 refuted. 0 times theorem prover too weak. 9676 trivial. 0 not checked. [2021-12-07 01:31:28,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887861857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:31:28,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:31:28,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 19 [2021-12-07 01:31:28,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237239355] [2021-12-07 01:31:28,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:31:28,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:31:28,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:31:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:31:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=401, Unknown=1, NotChecked=0, Total=462 [2021-12-07 01:31:28,052 INFO L87 Difference]: Start difference. First operand 524 states and 563 transitions. Second operand has 20 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:31:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:45,409 INFO L93 Difference]: Finished difference Result 908 states and 969 transitions. [2021-12-07 01:31:45,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:31:45,409 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 240 [2021-12-07 01:31:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:45,412 INFO L225 Difference]: With dead ends: 908 [2021-12-07 01:31:45,412 INFO L226 Difference]: Without dead ends: 908 [2021-12-07 01:31:45,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 687 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=129, Invalid=740, Unknown=1, NotChecked=0, Total=870 [2021-12-07 01:31:45,413 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 296 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1304 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:45,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 2636 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 667 Invalid, 0 Unknown, 1304 Unchecked, 0.9s Time] [2021-12-07 01:31:45,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-12-07 01:31:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 848. [2021-12-07 01:31:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 738 states have (on average 1.1720867208672088) internal successors, (865), 818 states have internal predecessors, (865), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:31:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 905 transitions. [2021-12-07 01:31:45,427 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 905 transitions. Word has length 240 [2021-12-07 01:31:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:45,427 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 905 transitions. [2021-12-07 01:31:45,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:31:45,427 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 905 transitions. [2021-12-07 01:31:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-07 01:31:45,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:45,432 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:31:45,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-07 01:31:45,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-12-07 01:31:45,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:31:45,833 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:31:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash 643866553, now seen corresponding path program 1 times [2021-12-07 01:31:45,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:31:45,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645017466] [2021-12-07 01:31:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:45,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:31:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:31:45,841 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:31:45,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:31:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:48,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:31:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:31:48,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:31:48,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:31:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:31:49,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:31:49,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:31:49,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-07 01:31:49,627 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:31:49,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:31:54,249 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:31:54,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-07 01:31:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 3527 refuted. 0 times theorem prover too weak. 7412 trivial. 0 not checked. [2021-12-07 01:31:55,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:31:55,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:31:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645017466] [2021-12-07 01:31:55,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645017466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:31:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754964885] [2021-12-07 01:31:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:55,947 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:31:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:31:55,948 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:31:55,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-07 01:32:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 01:32:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:32:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:32:34,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:32:34,982 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:32:34,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 01:32:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:32:37,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:32:37,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:32:37,219 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:32:37,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:32:37,651 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:32:37,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:32:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 3527 refuted. 0 times theorem prover too weak. 7412 trivial. 0 not checked. [2021-12-07 01:32:37,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:32:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754964885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:32:38,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:32:38,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2021-12-07 01:32:38,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72271837] [2021-12-07 01:32:38,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:32:38,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:32:38,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:32:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:32:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=672, Unknown=2, NotChecked=0, Total=756 [2021-12-07 01:32:38,397 INFO L87 Difference]: Start difference. First operand 848 states and 905 transitions. Second operand has 24 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-07 01:32:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:41,931 INFO L93 Difference]: Finished difference Result 978 states and 1061 transitions. [2021-12-07 01:32:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 01:32:41,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 240 [2021-12-07 01:32:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:41,935 INFO L225 Difference]: With dead ends: 978 [2021-12-07 01:32:41,935 INFO L226 Difference]: Without dead ends: 978 [2021-12-07 01:32:41,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 470 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=144, Invalid=1114, Unknown=2, NotChecked=0, Total=1260 [2021-12-07 01:32:41,936 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 228 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 5283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3083 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:41,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1477 Invalid, 5283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2178 Invalid, 0 Unknown, 3083 Unchecked, 2.8s Time] [2021-12-07 01:32:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-12-07 01:32:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 877. [2021-12-07 01:32:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 765 states have (on average 1.1725490196078432) internal successors, (897), 846 states have internal predecessors, (897), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-07 01:32:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 939 transitions. [2021-12-07 01:32:41,952 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 939 transitions. Word has length 240 [2021-12-07 01:32:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:41,952 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 939 transitions. [2021-12-07 01:32:41,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-07 01:32:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 939 transitions. [2021-12-07 01:32:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-07 01:32:41,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:41,954 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:32:42,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-12-07 01:32:42,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-07 01:32:42,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:32:42,355 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:32:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1514973335, now seen corresponding path program 1 times [2021-12-07 01:32:42,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:32:42,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970623064] [2021-12-07 01:32:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:42,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:32:42,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:32:42,360 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:32:42,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 01:32:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:45,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 01:32:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:32:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:32:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:32:47,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:32:47,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:32:47,916 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:32:47,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 01:32:54,450 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:32:54,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:32:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:32:54,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:32:55,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:32:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970623064] [2021-12-07 01:32:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970623064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:32:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715275373] [2021-12-07 01:32:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:55,197 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:32:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:32:55,198 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:32:55,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-12-07 01:33:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 01:33:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:32,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:33:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:33:32,594 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:33:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:33:32,610 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:33:32,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-07 01:33:33,091 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:33:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:33:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:33:33,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:33,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715275373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:33:33,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:33,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 18 [2021-12-07 01:33:33,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204000537] [2021-12-07 01:33:33,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:33,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:33:33,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:33:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=361, Unknown=4, NotChecked=0, Total=420 [2021-12-07 01:33:33,700 INFO L87 Difference]: Start difference. First operand 877 states and 939 transitions. Second operand has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:33:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:36,133 INFO L93 Difference]: Finished difference Result 988 states and 1075 transitions. [2021-12-07 01:33:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:33:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 241 [2021-12-07 01:33:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:36,137 INFO L225 Difference]: With dead ends: 988 [2021-12-07 01:33:36,138 INFO L226 Difference]: Without dead ends: 988 [2021-12-07 01:33:36,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 481 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=79, Invalid=517, Unknown=4, NotChecked=0, Total=600 [2021-12-07 01:33:36,138 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 338 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 917 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:36,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 990 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1704 Invalid, 0 Unknown, 917 Unchecked, 2.1s Time] [2021-12-07 01:33:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-12-07 01:33:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 885. [2021-12-07 01:33:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 773 states have (on average 1.1772315653298835) internal successors, (910), 854 states have internal predecessors, (910), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-07 01:33:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 952 transitions. [2021-12-07 01:33:36,156 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 952 transitions. Word has length 241 [2021-12-07 01:33:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:36,157 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 952 transitions. [2021-12-07 01:33:36,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:33:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 952 transitions. [2021-12-07 01:33:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-07 01:33:36,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:36,159 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:36,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-07 01:33:36,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-12-07 01:33:36,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:33:36,560 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:33:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1514973336, now seen corresponding path program 1 times [2021-12-07 01:33:36,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:36,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780313645] [2021-12-07 01:33:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:36,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:36,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:36,562 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:36,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-07 01:33:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:33:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13650 trivial. 0 not checked. [2021-12-07 01:33:38,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:33:38,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780313645] [2021-12-07 01:33:38,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780313645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:33:38,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:33:38,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:33:38,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455857366] [2021-12-07 01:33:38,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:33:38,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:33:38,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:33:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:33:38,881 INFO L87 Difference]: Start difference. First operand 885 states and 952 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:33:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:39,137 INFO L93 Difference]: Finished difference Result 898 states and 967 transitions. [2021-12-07 01:33:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:33:39,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 241 [2021-12-07 01:33:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:39,140 INFO L225 Difference]: With dead ends: 898 [2021-12-07 01:33:39,140 INFO L226 Difference]: Without dead ends: 898 [2021-12-07 01:33:39,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:33:39,141 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 157 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:39,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 532 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:33:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-12-07 01:33:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 884. [2021-12-07 01:33:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 773 states have (on average 1.1720569210866754) internal successors, (906), 853 states have internal predecessors, (906), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-07 01:33:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 948 transitions. [2021-12-07 01:33:39,152 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 948 transitions. Word has length 241 [2021-12-07 01:33:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:39,153 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 948 transitions. [2021-12-07 01:33:39,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:33:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 948 transitions. [2021-12-07 01:33:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-07 01:33:39,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:39,154 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:39,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-07 01:33:39,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:39,355 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:33:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 104538570, now seen corresponding path program 1 times [2021-12-07 01:33:39,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:39,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027964908] [2021-12-07 01:33:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:39,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:39,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:39,358 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:39,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-07 01:33:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:41,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:33:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:33:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:41,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 6 [2021-12-07 01:33:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:33:42,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027964908] [2021-12-07 01:33:42,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027964908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:42,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:42,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:33:42,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444128935] [2021-12-07 01:33:42,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:42,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:33:42,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:33:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:33:42,505 INFO L87 Difference]: Start difference. First operand 884 states and 948 transitions. Second operand has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:33:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:44,087 INFO L93 Difference]: Finished difference Result 897 states and 965 transitions. [2021-12-07 01:33:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:33:44,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 243 [2021-12-07 01:33:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:44,091 INFO L225 Difference]: With dead ends: 897 [2021-12-07 01:33:44,091 INFO L226 Difference]: Without dead ends: 897 [2021-12-07 01:33:44,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:33:44,092 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 408 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:44,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 1984 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:33:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-12-07 01:33:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 883. [2021-12-07 01:33:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 773 states have (on average 1.1694695989650712) internal successors, (904), 852 states have internal predecessors, (904), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-07 01:33:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 946 transitions. [2021-12-07 01:33:44,112 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 946 transitions. Word has length 243 [2021-12-07 01:33:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:44,112 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 946 transitions. [2021-12-07 01:33:44,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:33:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 946 transitions. [2021-12-07 01:33:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-07 01:33:44,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:44,114 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:44,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-07 01:33:44,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:44,315 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:33:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 457259333, now seen corresponding path program 1 times [2021-12-07 01:33:44,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:44,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969170675] [2021-12-07 01:33:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:44,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:44,324 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:44,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-07 01:33:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 01:33:47,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:47,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:33:47,517 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:33:47,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-07 01:33:47,857 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:33:47,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 01:33:48,212 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:33:48,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 34 [2021-12-07 01:33:51,548 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:33:51,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 34 [2021-12-07 01:33:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1447 proven. 3701 refuted. 1087 times theorem prover too weak. 7415 trivial. 0 not checked. [2021-12-07 01:33:53,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:53,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969170675] [2021-12-07 01:33:53,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969170675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:33:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1402019004] [2021-12-07 01:33:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:53,377 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:33:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:33:53,378 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:33:53,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-07 01:34:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:34:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 01:34:24,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:34:24,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:34:24,643 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:34:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-07 01:34:25,254 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:34:25,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 53 [2021-12-07 01:34:25,653 INFO L354 Elim1Store]: treesize reduction 14, result has 64.1 percent of original size [2021-12-07 01:34:25,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 52 [2021-12-07 01:34:29,076 INFO L354 Elim1Store]: treesize reduction 14, result has 64.1 percent of original size [2021-12-07 01:34:29,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 50 [2021-12-07 01:34:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1535 proven. 4788 refuted. 0 times theorem prover too weak. 7327 trivial. 0 not checked. [2021-12-07 01:34:30,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:34:30,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1402019004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:34:30,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:34:30,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28] total 36 [2021-12-07 01:34:30,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988241480] [2021-12-07 01:34:30,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:34:30,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 01:34:30,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:34:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 01:34:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1502, Unknown=1, NotChecked=0, Total=1722 [2021-12-07 01:34:30,825 INFO L87 Difference]: Start difference. First operand 883 states and 946 transitions. Second operand has 37 states, 34 states have (on average 3.235294117647059) internal successors, (110), 29 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-07 01:34:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:34:31,922 INFO L93 Difference]: Finished difference Result 1587 states and 1692 transitions. [2021-12-07 01:34:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 01:34:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.235294117647059) internal successors, (110), 29 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) Word has length 246 [2021-12-07 01:34:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:34:31,927 INFO L225 Difference]: With dead ends: 1587 [2021-12-07 01:34:31,927 INFO L226 Difference]: Without dead ends: 1587 [2021-12-07 01:34:31,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 468 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=302, Invalid=2049, Unknown=1, NotChecked=0, Total=2352 [2021-12-07 01:34:31,928 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 152 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1256 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:34:31,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 3478 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 452 Invalid, 0 Unknown, 1256 Unchecked, 0.6s Time] [2021-12-07 01:34:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-12-07 01:34:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1574. [2021-12-07 01:34:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1443 states have (on average 1.1198891198891199) internal successors, (1616), 1523 states have internal predecessors, (1616), 33 states have call successors, (33), 19 states have call predecessors, (33), 19 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-07 01:34:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 1682 transitions. [2021-12-07 01:34:31,944 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 1682 transitions. Word has length 246 [2021-12-07 01:34:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:34:31,944 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 1682 transitions. [2021-12-07 01:34:31,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.235294117647059) internal successors, (110), 29 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-07 01:34:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 1682 transitions. [2021-12-07 01:34:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-07 01:34:31,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:34:31,946 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:34:31,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-12-07 01:34:32,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-07 01:34:32,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:34:32,348 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:34:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:34:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash 457259334, now seen corresponding path program 1 times [2021-12-07 01:34:32,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:34:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528811861] [2021-12-07 01:34:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:34:32,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:34:32,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:34:32,353 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:34:32,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-07 01:34:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:34:36,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-07 01:34:36,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:34:36,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:34:36,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:34:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:36,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:34:36,630 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:34:36,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-07 01:34:37,011 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:34:37,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:34:37,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:34:37,612 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:34:37,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-07 01:34:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:42,853 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:34:42,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 01:34:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-07 01:34:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2536 proven. 3791 refuted. 0 times theorem prover too weak. 7323 trivial. 0 not checked. [2021-12-07 01:34:44,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:34:47,361 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:34:47,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528811861] [2021-12-07 01:34:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528811861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:34:47,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118998783] [2021-12-07 01:34:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:34:47,361 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:34:47,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:34:47,362 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:34:47,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-07 01:35:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:35:26,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-07 01:35:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:26,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:35:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:35:27,914 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:35:27,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-07 01:35:27,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:35:29,086 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:35:29,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-12-07 01:35:29,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:35:29,436 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:35:29,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:35:34,490 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:35:34,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-07 01:35:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1447 proven. 4880 refuted. 0 times theorem prover too weak. 7323 trivial. 0 not checked. [2021-12-07 01:35:36,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:37,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1118998783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:35:37,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:37,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 45 [2021-12-07 01:35:37,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112145531] [2021-12-07 01:35:37,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:37,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 01:35:37,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 01:35:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2359, Unknown=5, NotChecked=0, Total=2550 [2021-12-07 01:35:37,498 INFO L87 Difference]: Start difference. First operand 1574 states and 1682 transitions. Second operand has 46 states, 40 states have (on average 3.2) internal successors, (128), 37 states have internal predecessors, (128), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:35:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:43,622 INFO L93 Difference]: Finished difference Result 1745 states and 1885 transitions. [2021-12-07 01:35:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 01:35:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 3.2) internal successors, (128), 37 states have internal predecessors, (128), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 246 [2021-12-07 01:35:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:43,629 INFO L225 Difference]: With dead ends: 1745 [2021-12-07 01:35:43,629 INFO L226 Difference]: Without dead ends: 1745 [2021-12-07 01:35:43,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 471 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=317, Invalid=3710, Unknown=5, NotChecked=0, Total=4032 [2021-12-07 01:35:43,630 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 237 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 6477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3961 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:43,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1756 Invalid, 6477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2494 Invalid, 0 Unknown, 3961 Unchecked, 4.3s Time] [2021-12-07 01:35:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2021-12-07 01:35:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1619. [2021-12-07 01:35:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1487 states have (on average 1.1223940820443847) internal successors, (1669), 1566 states have internal predecessors, (1669), 32 states have call successors, (32), 21 states have call predecessors, (32), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-07 01:35:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1733 transitions. [2021-12-07 01:35:43,650 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1733 transitions. Word has length 246 [2021-12-07 01:35:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:43,651 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 1733 transitions. [2021-12-07 01:35:43,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 3.2) internal successors, (128), 37 states have internal predecessors, (128), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:35:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1733 transitions. [2021-12-07 01:35:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-07 01:35:43,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:43,652 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:43,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-07 01:35:44,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-12-07 01:35:44,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:35:44,054 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:35:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1290137488, now seen corresponding path program 1 times [2021-12-07 01:35:44,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:44,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036791441] [2021-12-07 01:35:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:35:44,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:44,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:44,060 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:44,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-07 01:35:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:35:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:35:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13650 trivial. 0 not checked. [2021-12-07 01:35:46,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:35:46,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:46,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036791441] [2021-12-07 01:35:46,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036791441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:35:46,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:35:46,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:35:46,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541620313] [2021-12-07 01:35:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:35:46,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:35:46,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:35:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:35:46,785 INFO L87 Difference]: Start difference. First operand 1619 states and 1733 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:35:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:47,118 INFO L93 Difference]: Finished difference Result 1626 states and 1742 transitions. [2021-12-07 01:35:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:35:47,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 247 [2021-12-07 01:35:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:47,124 INFO L225 Difference]: With dead ends: 1626 [2021-12-07 01:35:47,124 INFO L226 Difference]: Without dead ends: 1626 [2021-12-07 01:35:47,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:35:47,124 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 132 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 528 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:35:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-12-07 01:35:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1610. [2021-12-07 01:35:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1480 states have (on average 1.1195945945945946) internal successors, (1657), 1557 states have internal predecessors, (1657), 32 states have call successors, (32), 21 states have call predecessors, (32), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-07 01:35:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 1721 transitions. [2021-12-07 01:35:47,145 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 1721 transitions. Word has length 247 [2021-12-07 01:35:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:47,145 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 1721 transitions. [2021-12-07 01:35:47,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:35:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 1721 transitions. [2021-12-07 01:35:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-07 01:35:47,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:47,146 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:47,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-07 01:35:47,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:47,347 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:35:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1290137489, now seen corresponding path program 1 times [2021-12-07 01:35:47,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:47,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357497944] [2021-12-07 01:35:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:35:47,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:47,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:47,354 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:47,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-07 01:35:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:35:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:35:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:35:50,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:50,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:35:50,347 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 26 [2021-12-07 01:35:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:35:51,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:51,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357497944] [2021-12-07 01:35:51,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357497944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:35:51,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:51,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:35:51,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024337600] [2021-12-07 01:35:51,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:51,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:35:51,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:35:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:35:51,529 INFO L87 Difference]: Start difference. First operand 1610 states and 1721 transitions. Second operand has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:35:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:53,390 INFO L93 Difference]: Finished difference Result 1618 states and 1732 transitions. [2021-12-07 01:35:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:35:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 247 [2021-12-07 01:35:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:53,395 INFO L225 Difference]: With dead ends: 1618 [2021-12-07 01:35:53,395 INFO L226 Difference]: Without dead ends: 1618 [2021-12-07 01:35:53,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:35:53,396 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 277 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:53,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 2105 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-07 01:35:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-12-07 01:35:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1609. [2021-12-07 01:35:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1480 states have (on average 1.1189189189189188) internal successors, (1656), 1556 states have internal predecessors, (1656), 32 states have call successors, (32), 21 states have call predecessors, (32), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-07 01:35:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 1720 transitions. [2021-12-07 01:35:53,411 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 1720 transitions. Word has length 247 [2021-12-07 01:35:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:53,411 INFO L470 AbstractCegarLoop]: Abstraction has 1609 states and 1720 transitions. [2021-12-07 01:35:53,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:35:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 1720 transitions. [2021-12-07 01:35:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-07 01:35:53,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:53,413 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:53,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-07 01:35:53,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:53,613 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:35:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:53,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1423420783, now seen corresponding path program 1 times [2021-12-07 01:35:53,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252667629] [2021-12-07 01:35:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:35:53,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:53,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:53,615 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:53,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-07 01:35:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:35:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:35:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13650 trivial. 0 not checked. [2021-12-07 01:35:56,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:35:56,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:56,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252667629] [2021-12-07 01:35:56,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252667629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:35:56,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:35:56,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:35:56,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859673619] [2021-12-07 01:35:56,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:35:56,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:35:56,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:35:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:35:56,077 INFO L87 Difference]: Start difference. First operand 1609 states and 1720 transitions. Second operand has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:35:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:56,327 INFO L93 Difference]: Finished difference Result 1612 states and 1725 transitions. [2021-12-07 01:35:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:35:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 249 [2021-12-07 01:35:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:56,332 INFO L225 Difference]: With dead ends: 1612 [2021-12-07 01:35:56,332 INFO L226 Difference]: Without dead ends: 1612 [2021-12-07 01:35:56,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:35:56,333 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 36 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:56,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 393 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:35:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-12-07 01:35:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1608. [2021-12-07 01:35:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1480 states have (on average 1.1182432432432432) internal successors, (1655), 1555 states have internal predecessors, (1655), 32 states have call successors, (32), 21 states have call predecessors, (32), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-07 01:35:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1719 transitions. [2021-12-07 01:35:56,348 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1719 transitions. Word has length 249 [2021-12-07 01:35:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:56,349 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 1719 transitions. [2021-12-07 01:35:56,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:35:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1719 transitions. [2021-12-07 01:35:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-07 01:35:56,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:56,350 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:56,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-07 01:35:56,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:56,551 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:35:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1423420782, now seen corresponding path program 1 times [2021-12-07 01:35:56,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537167841] [2021-12-07 01:35:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:35:56,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:56,559 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:56,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-07 01:35:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:35:59,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:35:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 88 proven. 1351 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:35:59,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:59,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 6 [2021-12-07 01:36:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 88 proven. 1351 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:36:00,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:36:00,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537167841] [2021-12-07 01:36:00,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537167841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:36:00,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:36:00,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:36:00,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867574776] [2021-12-07 01:36:00,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:36:00,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:36:00,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:36:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:36:00,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:36:00,232 INFO L87 Difference]: Start difference. First operand 1608 states and 1719 transitions. Second operand has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:36:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:02,111 INFO L93 Difference]: Finished difference Result 1616 states and 1730 transitions. [2021-12-07 01:36:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:36:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 249 [2021-12-07 01:36:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:02,117 INFO L225 Difference]: With dead ends: 1616 [2021-12-07 01:36:02,117 INFO L226 Difference]: Without dead ends: 1616 [2021-12-07 01:36:02,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:36:02,118 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 361 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:02,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2620 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-07 01:36:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-12-07 01:36:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1607. [2021-12-07 01:36:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1480 states have (on average 1.1175675675675676) internal successors, (1654), 1554 states have internal predecessors, (1654), 32 states have call successors, (32), 21 states have call predecessors, (32), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-07 01:36:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 1718 transitions. [2021-12-07 01:36:02,133 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 1718 transitions. Word has length 249 [2021-12-07 01:36:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:02,134 INFO L470 AbstractCegarLoop]: Abstraction has 1607 states and 1718 transitions. [2021-12-07 01:36:02,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:36:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 1718 transitions. [2021-12-07 01:36:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-07 01:36:02,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:02,135 INFO L514 BasicCegarLoop]: trace histogram [159, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:02,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-07 01:36:02,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:36:02,337 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-12-07 01:36:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash -916372238, now seen corresponding path program 1 times [2021-12-07 01:36:02,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:36:02,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862212653] [2021-12-07 01:36:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:36:02,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:36:02,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:36:02,345 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:36:02,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b8014fb-3455-403d-8800-ee6db7b6322a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-07 01:36:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:05,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2201 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:36:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:05,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:36:06,076 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:36:06,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2021-12-07 01:36:06,500 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:36:06,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-12-07 01:36:06,848 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:36:06,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 39 [2021-12-07 01:36:07,252 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:36:07,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 43