./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/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_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/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_423b825c-1cda-453e-a2ea-c8520952c6f6/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 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:57:33,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:57:33,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:57:33,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:57:33,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:57:33,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:57:33,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:57:33,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:57:33,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:57:33,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:57:33,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:57:33,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:57:33,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:57:33,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:57:33,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:57:33,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:57:33,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:57:33,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:57:33,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:57:33,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:57:33,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:57:33,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:57:33,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:57:33,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:57:33,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:57:33,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:57:33,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:57:33,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:57:33,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:57:33,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:57:33,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:57:33,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:57:33,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:57:33,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:57:33,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:57:33,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:57:33,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:57:33,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:57:33,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:57:33,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:57:33,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:57:33,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 20:57:33,816 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:57:33,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:57:33,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:57:33,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:57:33,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:57:33,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:57:33,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:57:33,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:57:33,818 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:57:33,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:57:33,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:57:33,818 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 20:57:33,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:57:33,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:57:33,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:57:33,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:57:33,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:57:33,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:57:33,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:57:33,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:57:33,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:57:33,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:57:33,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:57:33,820 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_423b825c-1cda-453e-a2ea-c8520952c6f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 [2021-12-06 20:57:34,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:57:34,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:57:34,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:57:34,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:57:34,028 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:57:34,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2021-12-06 20:57:34,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/data/5dceb6445/48da4e442b55453c9219bd82f9e8f275/FLAG24209981b [2021-12-06 20:57:34,537 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:57:34,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2021-12-06 20:57:34,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/data/5dceb6445/48da4e442b55453c9219bd82f9e8f275/FLAG24209981b [2021-12-06 20:57:34,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/data/5dceb6445/48da4e442b55453c9219bd82f9e8f275 [2021-12-06 20:57:34,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:57:34,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:57:34,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:57:34,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:57:34,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:57:34,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c204b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34, skipping insertion in model container [2021-12-06 20:57:34,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:57:34,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:57:34,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:57:34,795 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:57:34,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:57:34,841 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:57:34,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34 WrapperNode [2021-12-06 20:57:34,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:57:34,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:57:34,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:57:34,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:57:34,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,873 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-06 20:57:34,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:57:34,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:57:34,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:57:34,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:57:34,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:57:34,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:57:34,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:57:34,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:57:34,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (1/1) ... [2021-12-06 20:57:34,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:57:34,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:34,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:57:34,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:57:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:57:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:57:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 20:57:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 20:57:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:57:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:57:35,012 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:57:35,014 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:57:35,157 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:57:35,162 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:57:35,162 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 20:57:35,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:57:35 BoogieIcfgContainer [2021-12-06 20:57:35,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:57:35,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:57:35,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:57:35,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:57:35,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:57:34" (1/3) ... [2021-12-06 20:57:35,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f70ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:57:35, skipping insertion in model container [2021-12-06 20:57:35,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:34" (2/3) ... [2021-12-06 20:57:35,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f70ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:57:35, skipping insertion in model container [2021-12-06 20:57:35,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:57:35" (3/3) ... [2021-12-06 20:57:35,169 INFO L111 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2021-12-06 20:57:35,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:57:35,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-06 20:57:35,205 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:57:35,210 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:57:35,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-06 20:57:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.9375) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:57:35,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 20:57:35,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110180879] [2021-12-06 20:57:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:35,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:35,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110180879] [2021-12-06 20:57:35,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110180879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:35,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:35,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:57:35,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684347114] [2021-12-06 20:57:35,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:35,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:35,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:35,403 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.9375) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:35,438 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-06 20:57:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:57:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:35,446 INFO L225 Difference]: With dead ends: 96 [2021-12-06 20:57:35,447 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 20:57:35,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:35,452 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:35,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 20:57:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2021-12-06 20:57:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 20:57:35,483 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-12-06 20:57:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:35,483 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 20:57:35,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 20:57:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:57:35,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:57:35,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:35,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-06 20:57:35,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462396595] [2021-12-06 20:57:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:35,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462396595] [2021-12-06 20:57:35,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462396595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:35,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:35,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:57:35,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152929832] [2021-12-06 20:57:35,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:35,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:57:35,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:57:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:57:35,542 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:35,570 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-12-06 20:57:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:57:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:57:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:35,571 INFO L225 Difference]: With dead ends: 51 [2021-12-06 20:57:35,571 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 20:57:35,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:57:35,573 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:35,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 20:57:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-06 20:57:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-12-06 20:57:35,578 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2021-12-06 20:57:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:35,579 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-12-06 20:57:35,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-12-06 20:57:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:57:35,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:57:35,580 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-06 20:57:35,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603687106] [2021-12-06 20:57:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:35,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:35,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603687106] [2021-12-06 20:57:35,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603687106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:35,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:35,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:57:35,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147076242] [2021-12-06 20:57:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:35,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:35,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:35,658 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:35,739 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-12-06 20:57:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:57:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:35,741 INFO L225 Difference]: With dead ends: 93 [2021-12-06 20:57:35,741 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 20:57:35,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:57:35,742 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:35,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 20:57:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2021-12-06 20:57:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-06 20:57:35,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2021-12-06 20:57:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:35,750 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-06 20:57:35,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-06 20:57:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:57:35,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:57:35,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-06 20:57:35,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458929538] [2021-12-06 20:57:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:35,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:35,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458929538] [2021-12-06 20:57:35,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458929538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:35,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:35,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:57:35,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093100639] [2021-12-06 20:57:35,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:35,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:35,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:35,813 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:35,841 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-12-06 20:57:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:35,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 20:57:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:35,842 INFO L225 Difference]: With dead ends: 52 [2021-12-06 20:57:35,842 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 20:57:35,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:35,844 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:35,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 20:57:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 20:57:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-12-06 20:57:35,849 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2021-12-06 20:57:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-12-06 20:57:35,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-12-06 20:57:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:57:35,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:57:35,850 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-06 20:57:35,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341138423] [2021-12-06 20:57:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:35,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:35,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341138423] [2021-12-06 20:57:35,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341138423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:35,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:35,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:57:35,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383683548] [2021-12-06 20:57:35,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:35,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:35,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:35,887 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:35,901 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-06 20:57:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:35,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 20:57:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:35,902 INFO L225 Difference]: With dead ends: 94 [2021-12-06 20:57:35,902 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 20:57:35,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:35,904 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:35,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 20:57:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-12-06 20:57:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-06 20:57:35,911 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-12-06 20:57:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:35,911 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-06 20:57:35,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-06 20:57:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:57:35,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:57:35,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-06 20:57:35,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963894558] [2021-12-06 20:57:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:35,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963894558] [2021-12-06 20:57:35,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963894558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:35,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:35,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:57:35,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328284809] [2021-12-06 20:57:35,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:57:35,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:57:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:57:35,945 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:35,970 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-12-06 20:57:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:57:35,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 20:57:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:35,971 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:57:35,971 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 20:57:35,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:57:35,972 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:35,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 20:57:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-06 20:57:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.553191489361702) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-06 20:57:35,976 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2021-12-06 20:57:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:35,976 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-06 20:57:35,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-06 20:57:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:57:35,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:57:35,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-06 20:57:35,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355757688] [2021-12-06 20:57:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:36,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355757688] [2021-12-06 20:57:36,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355757688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:36,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:36,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:57:36,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902379698] [2021-12-06 20:57:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:36,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:57:36,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:57:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:57:36,022 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:36,075 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-12-06 20:57:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:57:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 20:57:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:36,076 INFO L225 Difference]: With dead ends: 94 [2021-12-06 20:57:36,076 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 20:57:36,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:57:36,077 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:36,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 20:57:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-12-06 20:57:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-06 20:57:36,082 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2021-12-06 20:57:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:36,082 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-06 20:57:36,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-06 20:57:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 20:57:36,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:36,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:36,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:57:36,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-06 20:57:36,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:36,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116042753] [2021-12-06 20:57:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:36,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:36,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:36,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116042753] [2021-12-06 20:57:36,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116042753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:36,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:36,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:57:36,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711879688] [2021-12-06 20:57:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:36,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:36,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:36,125 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:36,144 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-12-06 20:57:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:36,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 20:57:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:36,145 INFO L225 Difference]: With dead ends: 62 [2021-12-06 20:57:36,145 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 20:57:36,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:36,146 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:36,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 20:57:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-06 20:57:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.530612244897959) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-12-06 20:57:36,151 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2021-12-06 20:57:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:36,151 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-12-06 20:57:36,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-12-06 20:57:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:57:36,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:36,153 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:36,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:57:36,153 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:36,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:36,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 20:57:36,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:36,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308082921] [2021-12-06 20:57:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:36,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:36,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:36,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308082921] [2021-12-06 20:57:36,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308082921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098342358] [2021-12-06 20:57:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:36,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:36,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:36,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:57:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:57:36,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:57:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 20:57:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:57:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:36,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:36,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098342358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:36,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:36,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-06 20:57:36,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631857153] [2021-12-06 20:57:36,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:36,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:57:36,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:57:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:57:36,550 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:36,687 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2021-12-06 20:57:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:57:36,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 20:57:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:36,689 INFO L225 Difference]: With dead ends: 143 [2021-12-06 20:57:36,689 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 20:57:36,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:57:36,690 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 235 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:36,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 256 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 20:57:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 57. [2021-12-06 20:57:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-06 20:57:36,696 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2021-12-06 20:57:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:36,696 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-06 20:57:36,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-06 20:57:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:57:36,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:36,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:36,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:57:36,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:36,898 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:36,898 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-12-06 20:57:36,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:36,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181597464] [2021-12-06 20:57:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:36,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:36,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:36,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181597464] [2021-12-06 20:57:36,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181597464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:36,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:36,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:57:36,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823586806] [2021-12-06 20:57:36,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:36,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:57:36,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:57:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:57:36,941 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:36,983 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-06 20:57:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:57:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:57:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:36,984 INFO L225 Difference]: With dead ends: 80 [2021-12-06 20:57:36,984 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 20:57:36,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:57:36,985 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:36,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 66 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 20:57:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2021-12-06 20:57:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-12-06 20:57:36,989 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 12 [2021-12-06 20:57:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:36,990 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-12-06 20:57:36,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:36,990 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-12-06 20:57:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:57:36,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:36,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:36,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 20:57:36,991 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:36,991 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-06 20:57:36,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:36,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131557568] [2021-12-06 20:57:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:36,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:37,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:37,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131557568] [2021-12-06 20:57:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131557568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:37,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:37,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:57:37,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582337444] [2021-12-06 20:57:37,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:37,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:37,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:37,015 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:37,039 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-12-06 20:57:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:57:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:37,040 INFO L225 Difference]: With dead ends: 65 [2021-12-06 20:57:37,040 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 20:57:37,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:57:37,041 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:37,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 20:57:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-06 20:57:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.490909090909091) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-12-06 20:57:37,046 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 12 [2021-12-06 20:57:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:37,046 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-12-06 20:57:37,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-12-06 20:57:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:57:37,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:37,047 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:37,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:57:37,048 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-06 20:57:37,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:37,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313337690] [2021-12-06 20:57:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:37,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:37,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313337690] [2021-12-06 20:57:37,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313337690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494793381] [2021-12-06 20:57:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:37,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:37,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:37,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:37,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:57:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:57:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:37,157 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:57:37,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:57:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:37,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:37,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494793381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:37,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:37,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 20:57:37,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138266086] [2021-12-06 20:57:37,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:37,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:57:37,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:57:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:57:37,347 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:37,463 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2021-12-06 20:57:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:57:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 20:57:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:37,464 INFO L225 Difference]: With dead ends: 139 [2021-12-06 20:57:37,464 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 20:57:37,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:57:37,465 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 261 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:37,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 216 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 20:57:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 62. [2021-12-06 20:57:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.471698113207547) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2021-12-06 20:57:37,468 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 13 [2021-12-06 20:57:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:37,468 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2021-12-06 20:57:37,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2021-12-06 20:57:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:57:37,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:37,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:37,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:57:37,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:37,671 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1062173030, now seen corresponding path program 1 times [2021-12-06 20:57:37,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:37,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609338436] [2021-12-06 20:57:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:37,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:37,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:37,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609338436] [2021-12-06 20:57:37,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609338436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:37,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:37,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:57:37,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886189580] [2021-12-06 20:57:37,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:37,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:57:37,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:57:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:57:37,761 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:37,838 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-12-06 20:57:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:57:37,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 20:57:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:37,840 INFO L225 Difference]: With dead ends: 59 [2021-12-06 20:57:37,840 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 20:57:37,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:57:37,841 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:37,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 46 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 20:57:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-06 20:57:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-12-06 20:57:37,844 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 15 [2021-12-06 20:57:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:37,845 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-12-06 20:57:37,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-12-06 20:57:37,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:57:37,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:37,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:37,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 20:57:37,846 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1062173031, now seen corresponding path program 1 times [2021-12-06 20:57:37,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:37,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377273594] [2021-12-06 20:57:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:37,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:37,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:37,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377273594] [2021-12-06 20:57:37,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377273594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:37,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:37,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:57:37,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597083577] [2021-12-06 20:57:37,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:37,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:57:37,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:57:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:57:37,888 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:37,926 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2021-12-06 20:57:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:57:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 20:57:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:37,927 INFO L225 Difference]: With dead ends: 75 [2021-12-06 20:57:37,927 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 20:57:37,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:37,927 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:37,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 20:57:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-12-06 20:57:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-12-06 20:57:37,930 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 15 [2021-12-06 20:57:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:37,930 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-12-06 20:57:37,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-12-06 20:57:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 20:57:37,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:37,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:37,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 20:57:37,931 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:37,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1184642481, now seen corresponding path program 1 times [2021-12-06 20:57:37,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:37,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131994030] [2021-12-06 20:57:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:37,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:38,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131994030] [2021-12-06 20:57:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131994030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:38,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:38,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:57:38,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467695018] [2021-12-06 20:57:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:38,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:57:38,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:57:38,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:57:38,003 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:38,050 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2021-12-06 20:57:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:57:38,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-06 20:57:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:38,051 INFO L225 Difference]: With dead ends: 115 [2021-12-06 20:57:38,051 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 20:57:38,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:38,052 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:38,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 87 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 20:57:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 63. [2021-12-06 20:57:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-12-06 20:57:38,054 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 19 [2021-12-06 20:57:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:38,054 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-12-06 20:57:38,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-12-06 20:57:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 20:57:38,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:38,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:38,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 20:57:38,055 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:38,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1972717743, now seen corresponding path program 1 times [2021-12-06 20:57:38,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:38,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140937475] [2021-12-06 20:57:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:38,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:38,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140937475] [2021-12-06 20:57:38,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140937475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:38,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:38,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:57:38,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522319183] [2021-12-06 20:57:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:38,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:57:38,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:57:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:57:38,073 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:38,078 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-12-06 20:57:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:57:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 20:57:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:38,079 INFO L225 Difference]: With dead ends: 66 [2021-12-06 20:57:38,080 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 20:57:38,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:57:38,080 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:38,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 20:57:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-06 20:57:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.305084745762712) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-12-06 20:57:38,083 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 20 [2021-12-06 20:57:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:38,083 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-12-06 20:57:38,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-12-06 20:57:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:57:38,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:38,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:38,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 20:57:38,085 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1849790580, now seen corresponding path program 1 times [2021-12-06 20:57:38,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399698656] [2021-12-06 20:57:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:38,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:38,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399698656] [2021-12-06 20:57:38,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399698656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:38,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:38,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:57:38,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542156767] [2021-12-06 20:57:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:38,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:57:38,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:57:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:57:38,164 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:38,227 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-12-06 20:57:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:57:38,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 20:57:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:38,228 INFO L225 Difference]: With dead ends: 77 [2021-12-06 20:57:38,228 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 20:57:38,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:57:38,229 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:38,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 193 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 20:57:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-06 20:57:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-12-06 20:57:38,232 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 22 [2021-12-06 20:57:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:38,232 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-12-06 20:57:38,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-12-06 20:57:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:57:38,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:38,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:38,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 20:57:38,233 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1627528266, now seen corresponding path program 1 times [2021-12-06 20:57:38,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:38,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932424186] [2021-12-06 20:57:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:38,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:38,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:38,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932424186] [2021-12-06 20:57:38,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932424186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:38,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:38,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 20:57:38,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141477460] [2021-12-06 20:57:38,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:38,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:57:38,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:57:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:57:38,340 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:38,428 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-06 20:57:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:57:38,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 20:57:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:38,430 INFO L225 Difference]: With dead ends: 80 [2021-12-06 20:57:38,430 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 20:57:38,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:57:38,431 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:38,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 168 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 20:57:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-12-06 20:57:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-06 20:57:38,433 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 22 [2021-12-06 20:57:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:38,434 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-06 20:57:38,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-06 20:57:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 20:57:38,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:38,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:38,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 20:57:38,435 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1399878823, now seen corresponding path program 1 times [2021-12-06 20:57:38,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988280630] [2021-12-06 20:57:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:38,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:38,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:38,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988280630] [2021-12-06 20:57:38,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988280630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624084636] [2021-12-06 20:57:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:38,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:38,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:38,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:57:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 20:57:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:38,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:57:38,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 20:57:38,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:57:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:38,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:38,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624084636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:38,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:38,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-06 20:57:38,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23889784] [2021-12-06 20:57:38,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:38,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 20:57:38,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:38,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 20:57:38,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:38,812 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:38,972 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-12-06 20:57:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:57:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 20:57:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:38,973 INFO L225 Difference]: With dead ends: 88 [2021-12-06 20:57:38,973 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 20:57:38,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:57:38,974 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 357 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:38,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 174 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 20:57:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2021-12-06 20:57:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-06 20:57:38,976 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 26 [2021-12-06 20:57:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:38,976 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-06 20:57:38,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-06 20:57:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 20:57:38,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:38,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:38,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:57:39,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:39,178 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:39,179 INFO L85 PathProgramCache]: Analyzing trace with hash -342423105, now seen corresponding path program 1 times [2021-12-06 20:57:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564445056] [2021-12-06 20:57:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:39,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:39,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564445056] [2021-12-06 20:57:39,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564445056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326151619] [2021-12-06 20:57:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:39,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:39,393 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:39,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:57:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:39,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 20:57:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:39,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:57:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:39,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:57:39,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326151619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:39,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:57:39,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-06 20:57:39,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725812755] [2021-12-06 20:57:39,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:39,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:57:39,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:39,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:57:39,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:39,555 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:39,611 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-12-06 20:57:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:57:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 20:57:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:39,612 INFO L225 Difference]: With dead ends: 71 [2021-12-06 20:57:39,612 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 20:57:39,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:57:39,613 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:39,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 137 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:57:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 20:57:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 20:57:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-06 20:57:39,615 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 29 [2021-12-06 20:57:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:39,616 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-06 20:57:39,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-06 20:57:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 20:57:39,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:39,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:39,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:57:39,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:39,818 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash -280383491, now seen corresponding path program 1 times [2021-12-06 20:57:39,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:39,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668907296] [2021-12-06 20:57:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:39,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:40,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668907296] [2021-12-06 20:57:40,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668907296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692621040] [2021-12-06 20:57:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:40,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:40,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:40,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:40,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:57:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 20:57:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:40,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:57:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:40,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:57:40,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692621040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:40,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:57:40,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 21 [2021-12-06 20:57:40,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518831258] [2021-12-06 20:57:40,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:40,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:57:40,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:57:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:57:40,432 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:40,468 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-12-06 20:57:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:57:40,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 20:57:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:40,469 INFO L225 Difference]: With dead ends: 67 [2021-12-06 20:57:40,469 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 20:57:40,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:57:40,470 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:40,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 114 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-06 20:57:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 20:57:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-12-06 20:57:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-06 20:57:40,473 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 29 [2021-12-06 20:57:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:40,473 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-06 20:57:40,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-06 20:57:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:57:40,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:40,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:40,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:57:40,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 20:57:40,675 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:40,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1068910272, now seen corresponding path program 1 times [2021-12-06 20:57:40,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:40,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761226818] [2021-12-06 20:57:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:40,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:40,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:40,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761226818] [2021-12-06 20:57:40,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761226818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:40,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830576320] [2021-12-06 20:57:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:40,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:40,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:40,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:40,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:57:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 20:57:40,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:41,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:57:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:41,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830576320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:41,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:41,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-06 20:57:41,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808545431] [2021-12-06 20:57:41,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:41,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 20:57:41,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 20:57:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:41,111 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 17 states, 16 states have (on average 4.625) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:41,259 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-12-06 20:57:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:57:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.625) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 20:57:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:41,260 INFO L225 Difference]: With dead ends: 84 [2021-12-06 20:57:41,260 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 20:57:41,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-12-06 20:57:41,261 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 267 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:41,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 145 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 20:57:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-12-06 20:57:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-12-06 20:57:41,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2021-12-06 20:57:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:41,265 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-12-06 20:57:41,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.625) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-12-06 20:57:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 20:57:41,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:41,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:41,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 20:57:41,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 20:57:41,466 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1533958547, now seen corresponding path program 1 times [2021-12-06 20:57:41,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:41,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13839537] [2021-12-06 20:57:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:41,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:41,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:41,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13839537] [2021-12-06 20:57:41,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13839537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:41,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061028817] [2021-12-06 20:57:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:41,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:41,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:41,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:57:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:41,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 20:57:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:41,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:57:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:42,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:42,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:57:42,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:57:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:42,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061028817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:42,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:42,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 15] total 33 [2021-12-06 20:57:42,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356970004] [2021-12-06 20:57:42,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:42,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 20:57:42,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 20:57:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 20:57:42,476 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:42,911 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2021-12-06 20:57:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 20:57:42,911 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 20:57:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:42,912 INFO L225 Difference]: With dead ends: 152 [2021-12-06 20:57:42,912 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 20:57:42,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=330, Invalid=2426, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 20:57:42,913 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:42,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 359 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 284 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-12-06 20:57:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 20:57:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2021-12-06 20:57:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 94 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-12-06 20:57:42,915 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 40 [2021-12-06 20:57:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:42,916 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-12-06 20:57:42,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-12-06 20:57:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 20:57:42,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:42,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:42,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:57:43,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:43,118 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash -36257516, now seen corresponding path program 1 times [2021-12-06 20:57:43,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039660369] [2021-12-06 20:57:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:43,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:43,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:43,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039660369] [2021-12-06 20:57:43,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039660369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:43,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621826299] [2021-12-06 20:57:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:43,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:43,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:43,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:43,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:57:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:57:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:43,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:43,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:57:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621826299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:43,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:43,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-06 20:57:43,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597669755] [2021-12-06 20:57:43,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:43,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:57:43,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:57:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:57:43,504 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:43,692 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2021-12-06 20:57:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:57:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 47 [2021-12-06 20:57:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:43,693 INFO L225 Difference]: With dead ends: 133 [2021-12-06 20:57:43,693 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 20:57:43,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-06 20:57:43,694 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 475 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:43,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 247 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 20:57:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2021-12-06 20:57:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2021-12-06 20:57:43,697 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 47 [2021-12-06 20:57:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:43,697 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2021-12-06 20:57:43,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2021-12-06 20:57:43,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 20:57:43,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:43,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:43,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:57:43,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:43,898 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1788924915, now seen corresponding path program 2 times [2021-12-06 20:57:43,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:43,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983872295] [2021-12-06 20:57:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:43,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:57:43,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983872295] [2021-12-06 20:57:43,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983872295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989852980] [2021-12-06 20:57:43,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:57:43,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:43,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:43,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:43,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:57:44,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:57:44,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:44,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:57:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:57:44,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:44,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:57:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:57:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989852980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:44,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:44,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-06 20:57:44,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925107349] [2021-12-06 20:57:44,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:44,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:57:44,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:57:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:57:44,274 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:44,434 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2021-12-06 20:57:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:57:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 20:57:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:44,435 INFO L225 Difference]: With dead ends: 203 [2021-12-06 20:57:44,435 INFO L226 Difference]: Without dead ends: 203 [2021-12-06 20:57:44,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-06 20:57:44,436 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 386 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:44,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 281 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-06 20:57:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 130. [2021-12-06 20:57:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 129 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2021-12-06 20:57:44,439 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 48 [2021-12-06 20:57:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:44,439 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2021-12-06 20:57:44,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2021-12-06 20:57:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 20:57:44,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:44,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:44,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:57:44,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:44,642 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1676974911, now seen corresponding path program 1 times [2021-12-06 20:57:44,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595621301] [2021-12-06 20:57:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:44,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:44,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:44,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595621301] [2021-12-06 20:57:44,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595621301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:44,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526789638] [2021-12-06 20:57:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:44,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:44,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:44,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:57:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 20:57:44,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:44,999 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:57:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:57:45,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:57:45,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:57:45,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:57:45,596 INFO L354 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2021-12-06 20:57:45,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-12-06 20:57:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:45,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:46,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:57:46,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 20:57:46,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 20:57:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:46,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526789638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:46,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:46,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 49 [2021-12-06 20:57:46,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289538493] [2021-12-06 20:57:46,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:46,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 20:57:46,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:46,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 20:57:46,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:57:46,463 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 49 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:47,370 INFO L93 Difference]: Finished difference Result 263 states and 296 transitions. [2021-12-06 20:57:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 20:57:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 49 states have internal predecessors, (145), 0 states have call successors, (0), 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 54 [2021-12-06 20:57:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:47,372 INFO L225 Difference]: With dead ends: 263 [2021-12-06 20:57:47,372 INFO L226 Difference]: Without dead ends: 263 [2021-12-06 20:57:47,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=666, Invalid=5814, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 20:57:47,374 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 191 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:47,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 571 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 353 Invalid, 0 Unknown, 223 Unchecked, 0.1s Time] [2021-12-06 20:57:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-06 20:57:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 254. [2021-12-06 20:57:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 251 states have (on average 1.1434262948207172) internal successors, (287), 253 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2021-12-06 20:57:47,380 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 54 [2021-12-06 20:57:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:47,381 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2021-12-06 20:57:47,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 49 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2021-12-06 20:57:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 20:57:47,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:47,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:47,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:57:47,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:47,584 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash -242750107, now seen corresponding path program 2 times [2021-12-06 20:57:47,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:47,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332240564] [2021-12-06 20:57:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:47,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:47,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:47,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332240564] [2021-12-06 20:57:47,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332240564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:47,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632050773] [2021-12-06 20:57:47,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:57:47,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:47,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:47,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:47,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:57:48,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:57:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:48,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 20:57:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:48,024 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:57:48,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:57:48,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:57:48,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:57:48,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:57:48,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:57:48,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 20:57:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 20:57:48,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:48,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:57:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 20:57:48,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:57:48,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 20:57:48,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 20:57:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 20:57:49,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632050773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:49,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:49,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 35 [2021-12-06 20:57:49,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417727703] [2021-12-06 20:57:49,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:49,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 20:57:49,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 20:57:49,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1075, Unknown=14, NotChecked=0, Total=1190 [2021-12-06 20:57:49,006 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:49,697 INFO L93 Difference]: Finished difference Result 314 states and 349 transitions. [2021-12-06 20:57:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:57:49,697 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-06 20:57:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:49,698 INFO L225 Difference]: With dead ends: 314 [2021-12-06 20:57:49,698 INFO L226 Difference]: Without dead ends: 277 [2021-12-06 20:57:49,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=366, Invalid=3042, Unknown=14, NotChecked=0, Total=3422 [2021-12-06 20:57:49,700 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 117 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:49,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 521 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 289 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2021-12-06 20:57:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-06 20:57:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 271. [2021-12-06 20:57:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 268 states have (on average 1.1417910447761195) internal successors, (306), 270 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 306 transitions. [2021-12-06 20:57:49,704 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 306 transitions. Word has length 57 [2021-12-06 20:57:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:49,704 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 306 transitions. [2021-12-06 20:57:49,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 306 transitions. [2021-12-06 20:57:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:57:49,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:49,705 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:49,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 20:57:49,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 20:57:49,907 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1533214746, now seen corresponding path program 1 times [2021-12-06 20:57:49,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:49,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041150532] [2021-12-06 20:57:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:49,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:50,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:50,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041150532] [2021-12-06 20:57:50,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041150532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:50,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448443728] [2021-12-06 20:57:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:50,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:50,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:50,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:50,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:57:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:50,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:57:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:50,125 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:57:50,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:57:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:50,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:50,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448443728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:50,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:50,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-12-06 20:57:50,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023335399] [2021-12-06 20:57:50,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:50,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:57:50,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:50,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:57:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:57:50,623 INFO L87 Difference]: Start difference. First operand 271 states and 306 transitions. Second operand has 31 states, 30 states have (on average 5.666666666666667) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:50,829 INFO L93 Difference]: Finished difference Result 351 states and 394 transitions. [2021-12-06 20:57:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:57:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.666666666666667) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 20:57:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:50,830 INFO L225 Difference]: With dead ends: 351 [2021-12-06 20:57:50,830 INFO L226 Difference]: Without dead ends: 345 [2021-12-06 20:57:50,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:57:50,831 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 377 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:50,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 372 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-06 20:57:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 313. [2021-12-06 20:57:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 310 states have (on average 1.135483870967742) internal successors, (352), 312 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 352 transitions. [2021-12-06 20:57:50,837 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 352 transitions. Word has length 61 [2021-12-06 20:57:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:50,837 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 352 transitions. [2021-12-06 20:57:50,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.666666666666667) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 352 transitions. [2021-12-06 20:57:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:57:50,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:50,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:50,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:57:51,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 20:57:51,039 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:51,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash -794649942, now seen corresponding path program 3 times [2021-12-06 20:57:51,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:51,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314715478] [2021-12-06 20:57:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:51,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:57:51,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:51,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314715478] [2021-12-06 20:57:51,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314715478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:51,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125529411] [2021-12-06 20:57:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:57:51,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:51,201 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:51,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:57:51,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:57:51,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 20:57:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:51,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:57:51,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:57:51,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:57:51,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-06 20:57:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:57:51,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:51,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:57:51,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:57:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:57:51,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125529411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:51,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:51,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 35 [2021-12-06 20:57:51,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732947714] [2021-12-06 20:57:51,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:51,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 20:57:51,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 20:57:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 20:57:51,954 INFO L87 Difference]: Start difference. First operand 313 states and 352 transitions. Second operand has 35 states, 35 states have (on average 4.142857142857143) internal successors, (145), 35 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:52,723 INFO L93 Difference]: Finished difference Result 480 states and 515 transitions. [2021-12-06 20:57:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 20:57:52,723 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.142857142857143) internal successors, (145), 35 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 20:57:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:52,725 INFO L225 Difference]: With dead ends: 480 [2021-12-06 20:57:52,725 INFO L226 Difference]: Without dead ends: 380 [2021-12-06 20:57:52,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=420, Invalid=4982, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 20:57:52,727 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 224 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:52,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1020 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 615 Invalid, 0 Unknown, 377 Unchecked, 0.2s Time] [2021-12-06 20:57:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-12-06 20:57:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 239. [2021-12-06 20:57:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 236 states have (on average 1.1144067796610169) internal successors, (263), 238 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 263 transitions. [2021-12-06 20:57:52,731 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 263 transitions. Word has length 61 [2021-12-06 20:57:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:52,732 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 263 transitions. [2021-12-06 20:57:52,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.142857142857143) internal successors, (145), 35 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 263 transitions. [2021-12-06 20:57:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 20:57:52,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:52,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:52,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:57:52,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 20:57:52,934 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:52,935 INFO L85 PathProgramCache]: Analyzing trace with hash 206881812, now seen corresponding path program 3 times [2021-12-06 20:57:52,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:52,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755537966] [2021-12-06 20:57:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:52,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:57:53,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:53,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755537966] [2021-12-06 20:57:53,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755537966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:53,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116140181] [2021-12-06 20:57:53,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:57:53,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:53,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:53,066 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:53,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:57:53,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:57:53,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:57:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:57:53,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:53,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 20:57:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:57:53,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116140181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:53,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:53,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2021-12-06 20:57:53,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26542328] [2021-12-06 20:57:53,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:53,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:57:53,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:53,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:57:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-12-06 20:57:53,498 INFO L87 Difference]: Start difference. First operand 239 states and 263 transitions. Second operand has 27 states, 26 states have (on average 5.615384615384615) internal successors, (146), 27 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:53,766 INFO L93 Difference]: Finished difference Result 411 states and 443 transitions. [2021-12-06 20:57:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:57:53,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.615384615384615) internal successors, (146), 27 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 20:57:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:53,768 INFO L225 Difference]: With dead ends: 411 [2021-12-06 20:57:53,768 INFO L226 Difference]: Without dead ends: 411 [2021-12-06 20:57:53,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 20:57:53,770 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 438 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:53,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 602 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:57:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-12-06 20:57:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 252. [2021-12-06 20:57:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 249 states have (on average 1.1164658634538152) internal successors, (278), 251 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 278 transitions. [2021-12-06 20:57:53,777 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 278 transitions. Word has length 66 [2021-12-06 20:57:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:53,777 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 278 transitions. [2021-12-06 20:57:53,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.615384615384615) internal successors, (146), 27 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 278 transitions. [2021-12-06 20:57:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 20:57:53,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:53,778 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:53,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:57:53,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:53,979 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash -541897289, now seen corresponding path program 2 times [2021-12-06 20:57:53,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:53,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995103878] [2021-12-06 20:57:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:53,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:54,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995103878] [2021-12-06 20:57:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995103878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762212696] [2021-12-06 20:57:54,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:57:54,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:54,115 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:54,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:57:54,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:57:54,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 20:57:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:54,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:57:54,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:57:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:54,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:54,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:57:54,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:57:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:54,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762212696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:54,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:54,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2021-12-06 20:57:54,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391035308] [2021-12-06 20:57:54,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:57:54,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:54,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:57:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:57:54,910 INFO L87 Difference]: Start difference. First operand 252 states and 278 transitions. Second operand has 37 states, 37 states have (on average 4.054054054054054) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:55,318 INFO L93 Difference]: Finished difference Result 414 states and 445 transitions. [2021-12-06 20:57:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:57:55,318 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.054054054054054) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 20:57:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:55,319 INFO L225 Difference]: With dead ends: 414 [2021-12-06 20:57:55,319 INFO L226 Difference]: Without dead ends: 273 [2021-12-06 20:57:55,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=2115, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 20:57:55,321 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 201 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:55,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 638 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 587 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-12-06 20:57:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-06 20:57:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 264. [2021-12-06 20:57:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 261 states have (on average 1.1111111111111112) internal successors, (290), 263 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 290 transitions. [2021-12-06 20:57:55,324 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 290 transitions. Word has length 71 [2021-12-06 20:57:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:55,324 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 290 transitions. [2021-12-06 20:57:55,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.054054054054054) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 290 transitions. [2021-12-06 20:57:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:57:55,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:55,325 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:55,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:57:55,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:55,526 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1112009926, now seen corresponding path program 3 times [2021-12-06 20:57:55,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:55,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506445733] [2021-12-06 20:57:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:55,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:55,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:55,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506445733] [2021-12-06 20:57:55,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506445733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:55,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256007666] [2021-12-06 20:57:55,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:57:55,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:55,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:55,645 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:55,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:57:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 20:57:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 20:57:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:55,746 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:57:55,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:57:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:56,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:56,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256007666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:56,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:56,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2021-12-06 20:57:56,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863614044] [2021-12-06 20:57:56,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:56,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:57:56,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:57:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:57:56,394 INFO L87 Difference]: Start difference. First operand 264 states and 290 transitions. Second operand has 37 states, 36 states have (on average 6.027777777777778) internal successors, (217), 37 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:56,713 INFO L93 Difference]: Finished difference Result 355 states and 395 transitions. [2021-12-06 20:57:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:57:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 6.027777777777778) internal successors, (217), 37 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 20:57:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:56,714 INFO L225 Difference]: With dead ends: 355 [2021-12-06 20:57:56,715 INFO L226 Difference]: Without dead ends: 349 [2021-12-06 20:57:56,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=1721, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 20:57:56,716 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 637 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:56,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 390 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:57:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-06 20:57:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 316. [2021-12-06 20:57:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 313 states have (on average 1.1086261980830672) internal successors, (347), 315 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 347 transitions. [2021-12-06 20:57:56,720 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 347 transitions. Word has length 75 [2021-12-06 20:57:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:56,720 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 347 transitions. [2021-12-06 20:57:56,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 6.027777777777778) internal successors, (217), 37 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 347 transitions. [2021-12-06 20:57:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 20:57:56,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:56,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:56,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:57:56,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:56,923 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 739173411, now seen corresponding path program 2 times [2021-12-06 20:57:56,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142706299] [2021-12-06 20:57:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:56,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 34 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:57:57,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142706299] [2021-12-06 20:57:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142706299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224423879] [2021-12-06 20:57:57,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:57:57,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:57,299 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:57,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:57:57,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:57:57,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 20:57:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:57,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:57:57,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:57:57,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 20:57:57,839 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 20:57:57,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 20:57:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 20:57:57,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:57:58,021 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_648 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-06 20:57:58,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:57:58,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 20:57:58,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:57:58,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 20:57:58,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:57:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 20:57:58,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224423879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:57:58,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:57:58,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 42 [2021-12-06 20:57:58,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606157384] [2021-12-06 20:57:58,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:57:58,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 20:57:58,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 20:57:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1524, Unknown=1, NotChecked=78, Total=1722 [2021-12-06 20:57:58,209 INFO L87 Difference]: Start difference. First operand 316 states and 347 transitions. Second operand has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:58,895 INFO L93 Difference]: Finished difference Result 475 states and 511 transitions. [2021-12-06 20:57:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:57:58,895 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 20:57:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:58,897 INFO L225 Difference]: With dead ends: 475 [2021-12-06 20:57:58,897 INFO L226 Difference]: Without dead ends: 467 [2021-12-06 20:57:58,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=3376, Unknown=1, NotChecked=118, Total=3782 [2021-12-06 20:57:58,899 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 233 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:58,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 981 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1008 Invalid, 0 Unknown, 254 Unchecked, 0.3s Time] [2021-12-06 20:57:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-06 20:57:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 361. [2021-12-06 20:57:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 358 states have (on average 1.111731843575419) internal successors, (398), 360 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 398 transitions. [2021-12-06 20:57:58,904 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 398 transitions. Word has length 76 [2021-12-06 20:57:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:58,904 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 398 transitions. [2021-12-06 20:57:58,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 398 transitions. [2021-12-06 20:57:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 20:57:58,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:58,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:58,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 20:57:59,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 20:57:59,106 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:57:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:59,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1195119682, now seen corresponding path program 4 times [2021-12-06 20:57:59,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:59,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158610687] [2021-12-06 20:57:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:59,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:59,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158610687] [2021-12-06 20:57:59,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158610687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:57:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774901586] [2021-12-06 20:57:59,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:57:59,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:57:59,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:59,453 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:57:59,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:57:59,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:57:59,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:57:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 20:57:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:57:59,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:57:59,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 20:57:59,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:57:59,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:58:00,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:58:00,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:00,342 INFO L354 Elim1Store]: treesize reduction 17, result has 43.3 percent of original size [2021-12-06 20:58:00,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-12-06 20:58:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 39 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:58:00,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:00,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:00,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 20:58:00,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:00,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 20:58:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 20:58:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 33 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:58:01,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774901586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:01,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:01,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 54 [2021-12-06 20:58:01,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235454709] [2021-12-06 20:58:01,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:01,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 20:58:01,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 20:58:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2659, Unknown=6, NotChecked=0, Total=2862 [2021-12-06 20:58:01,468 INFO L87 Difference]: Start difference. First operand 361 states and 398 transitions. Second operand has 54 states, 54 states have (on average 3.7777777777777777) internal successors, (204), 54 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:02,252 INFO L93 Difference]: Finished difference Result 600 states and 658 transitions. [2021-12-06 20:58:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:58:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7777777777777777) internal successors, (204), 54 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 20:58:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:02,254 INFO L225 Difference]: With dead ends: 600 [2021-12-06 20:58:02,254 INFO L226 Difference]: Without dead ends: 592 [2021-12-06 20:58:02,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 131 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=467, Invalid=5227, Unknown=6, NotChecked=0, Total=5700 [2021-12-06 20:58:02,256 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 256 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 560 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:02,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1770 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 612 Invalid, 0 Unknown, 560 Unchecked, 0.2s Time] [2021-12-06 20:58:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-12-06 20:58:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 440. [2021-12-06 20:58:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 437 states have (on average 1.1121281464530892) internal successors, (486), 439 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 486 transitions. [2021-12-06 20:58:02,262 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 486 transitions. Word has length 80 [2021-12-06 20:58:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:02,262 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 486 transitions. [2021-12-06 20:58:02,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7777777777777777) internal successors, (204), 54 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 486 transitions. [2021-12-06 20:58:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 20:58:02,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:02,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:02,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 20:58:02,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 20:58:02,465 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1970623707, now seen corresponding path program 5 times [2021-12-06 20:58:02,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:02,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744020201] [2021-12-06 20:58:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:02,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:58:02,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:02,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744020201] [2021-12-06 20:58:02,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744020201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:02,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385732390] [2021-12-06 20:58:02,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:58:02,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:02,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:02,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:02,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 20:58:02,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 20:58:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 20:58:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:58:02,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:03,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 20:58:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:58:03,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385732390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:03,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:03,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-12-06 20:58:03,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534361797] [2021-12-06 20:58:03,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:03,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:58:03,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:58:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:58:03,212 INFO L87 Difference]: Start difference. First operand 440 states and 486 transitions. Second operand has 31 states, 30 states have (on average 5.866666666666666) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:03,590 INFO L93 Difference]: Finished difference Result 652 states and 699 transitions. [2021-12-06 20:58:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:58:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.866666666666666) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 20:58:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:03,593 INFO L225 Difference]: With dead ends: 652 [2021-12-06 20:58:03,593 INFO L226 Difference]: Without dead ends: 652 [2021-12-06 20:58:03,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 20:58:03,594 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 415 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:03,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1014 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:58:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-12-06 20:58:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 453. [2021-12-06 20:58:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 450 states have (on average 1.1133333333333333) internal successors, (501), 452 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 501 transitions. [2021-12-06 20:58:03,601 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 501 transitions. Word has length 84 [2021-12-06 20:58:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:03,601 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 501 transitions. [2021-12-06 20:58:03,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.866666666666666) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 501 transitions. [2021-12-06 20:58:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 20:58:03,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:03,602 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:03,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 20:58:03,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:03,803 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1734166539, now seen corresponding path program 4 times [2021-12-06 20:58:03,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:03,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853281041] [2021-12-06 20:58:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:03,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:03,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:03,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853281041] [2021-12-06 20:58:03,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853281041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:03,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149616616] [2021-12-06 20:58:03,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:58:03,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:03,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:03,988 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:03,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 20:58:04,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:58:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:04,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 20:58:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:04,076 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:58:04,076 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:58:04,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:58:04,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:04,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:04,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-12-06 20:58:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 112 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:04,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:05,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 20:58:05,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:05,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-06 20:58:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 64 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:05,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149616616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:05,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:05,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 52 [2021-12-06 20:58:05,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573336383] [2021-12-06 20:58:05,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:05,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 20:58:05,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 20:58:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2377, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 20:58:05,576 INFO L87 Difference]: Start difference. First operand 453 states and 501 transitions. Second operand has 52 states, 52 states have (on average 4.365384615384615) internal successors, (227), 52 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:06,108 INFO L93 Difference]: Finished difference Result 765 states and 827 transitions. [2021-12-06 20:58:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:58:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.365384615384615) internal successors, (227), 52 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 20:58:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:06,110 INFO L225 Difference]: With dead ends: 765 [2021-12-06 20:58:06,110 INFO L226 Difference]: Without dead ends: 481 [2021-12-06 20:58:06,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=591, Invalid=4521, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 20:58:06,111 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 129 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:06,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 858 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 445 Invalid, 0 Unknown, 215 Unchecked, 0.1s Time] [2021-12-06 20:58:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-12-06 20:58:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 469. [2021-12-06 20:58:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 466 states have (on average 1.109442060085837) internal successors, (517), 468 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 517 transitions. [2021-12-06 20:58:06,117 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 517 transitions. Word has length 85 [2021-12-06 20:58:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:06,117 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 517 transitions. [2021-12-06 20:58:06,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.365384615384615) internal successors, (227), 52 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 517 transitions. [2021-12-06 20:58:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 20:58:06,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:06,118 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:06,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 20:58:06,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 20:58:06,319 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1114418254, now seen corresponding path program 5 times [2021-12-06 20:58:06,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:06,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227509983] [2021-12-06 20:58:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:06,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:06,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227509983] [2021-12-06 20:58:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227509983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767648294] [2021-12-06 20:58:06,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:58:06,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:06,458 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:06,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:58:06,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 20:58:06,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:06,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 20:58:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:06,559 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:58:06,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:58:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:06,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:07,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767648294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:07,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:07,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2021-12-06 20:58:07,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447964126] [2021-12-06 20:58:07,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:07,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 20:58:07,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 20:58:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 20:58:07,267 INFO L87 Difference]: Start difference. First operand 469 states and 517 transitions. Second operand has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:07,611 INFO L93 Difference]: Finished difference Result 608 states and 679 transitions. [2021-12-06 20:58:07,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:58:07,611 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 20:58:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:07,613 INFO L225 Difference]: With dead ends: 608 [2021-12-06 20:58:07,613 INFO L226 Difference]: Without dead ends: 602 [2021-12-06 20:58:07,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1916, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:58:07,614 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 824 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:07,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 681 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:58:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-12-06 20:58:07,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 551. [2021-12-06 20:58:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 548 states have (on average 1.1076642335766422) internal successors, (607), 550 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 607 transitions. [2021-12-06 20:58:07,620 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 607 transitions. Word has length 89 [2021-12-06 20:58:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:07,620 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 607 transitions. [2021-12-06 20:58:07,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 607 transitions. [2021-12-06 20:58:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 20:58:07,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:07,621 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:07,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 20:58:07,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 20:58:07,822 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1557638523, now seen corresponding path program 6 times [2021-12-06 20:58:07,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243023592] [2021-12-06 20:58:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:07,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 33 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:58:08,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243023592] [2021-12-06 20:58:08,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243023592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330237578] [2021-12-06 20:58:08,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:58:08,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:08,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:08,184 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:08,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:58:08,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 20:58:08,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:08,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 20:58:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:08,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:58:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:08,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 20:58:09,093 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 20:58:09,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-06 20:58:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 9 proven. 124 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 20:58:09,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:09,575 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_subseq_~pt~0#1.offset| Int) (v_ArrVal_896 (Array Int Int))) (let ((.cse0 (select v_ArrVal_896 |ULTIMATE.start_subseq_~pt~0#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_896) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) .cse0))))) is different from false [2021-12-06 20:58:09,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:09,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 20:58:09,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:09,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2021-12-06 20:58:09,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:09,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-12-06 20:58:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 9 proven. 124 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 20:58:09,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330237578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:09,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:09,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 21] total 54 [2021-12-06 20:58:09,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020935269] [2021-12-06 20:58:09,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:09,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 20:58:09,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 20:58:09,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2577, Unknown=1, NotChecked=102, Total=2862 [2021-12-06 20:58:09,808 INFO L87 Difference]: Start difference. First operand 551 states and 607 transitions. Second operand has 54 states, 54 states have (on average 4.277777777777778) internal successors, (231), 54 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:10,628 INFO L93 Difference]: Finished difference Result 926 states and 1007 transitions. [2021-12-06 20:58:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 20:58:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.277777777777778) internal successors, (231), 54 states have internal predecessors, (231), 0 states have call successors, (0), 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 98 [2021-12-06 20:58:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:10,631 INFO L225 Difference]: With dead ends: 926 [2021-12-06 20:58:10,631 INFO L226 Difference]: Without dead ends: 918 [2021-12-06 20:58:10,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=4649, Unknown=1, NotChecked=138, Total=5112 [2021-12-06 20:58:10,632 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 216 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:10,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 2346 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1223 Invalid, 0 Unknown, 1199 Unchecked, 0.3s Time] [2021-12-06 20:58:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-12-06 20:58:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 589. [2021-12-06 20:58:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 586 states have (on average 1.10580204778157) internal successors, (648), 588 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 648 transitions. [2021-12-06 20:58:10,639 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 648 transitions. Word has length 98 [2021-12-06 20:58:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:10,639 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 648 transitions. [2021-12-06 20:58:10,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.277777777777778) internal successors, (231), 54 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 648 transitions. [2021-12-06 20:58:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 20:58:10,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:10,641 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:10,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 20:58:10,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 20:58:10,842 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash -339437537, now seen corresponding path program 6 times [2021-12-06 20:58:10,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:10,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954619597] [2021-12-06 20:58:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:10,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:11,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954619597] [2021-12-06 20:58:11,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954619597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140640691] [2021-12-06 20:58:11,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:58:11,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:11,047 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:11,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 20:58:11,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 20:58:11,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:11,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 20:58:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:11,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:11,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:11,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:58:11,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:58:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:11,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140640691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:11,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:11,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 36 [2021-12-06 20:58:11,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627527327] [2021-12-06 20:58:11,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:11,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 20:58:11,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 20:58:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 20:58:11,606 INFO L87 Difference]: Start difference. First operand 589 states and 648 transitions. Second operand has 36 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:12,111 INFO L93 Difference]: Finished difference Result 1003 states and 1085 transitions. [2021-12-06 20:58:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 20:58:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 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 99 [2021-12-06 20:58:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:12,113 INFO L225 Difference]: With dead ends: 1003 [2021-12-06 20:58:12,113 INFO L226 Difference]: Without dead ends: 679 [2021-12-06 20:58:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=2429, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 20:58:12,114 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 436 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 1120 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:58:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-06 20:58:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 663. [2021-12-06 20:58:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 660 states have (on average 1.0954545454545455) internal successors, (723), 662 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 723 transitions. [2021-12-06 20:58:12,120 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 723 transitions. Word has length 99 [2021-12-06 20:58:12,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:12,120 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 723 transitions. [2021-12-06 20:58:12,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 723 transitions. [2021-12-06 20:58:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 20:58:12,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:12,122 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:12,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 20:58:12,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 20:58:12,323 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash 603885154, now seen corresponding path program 7 times [2021-12-06 20:58:12,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:12,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644410508] [2021-12-06 20:58:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:12,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 15 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 20:58:12,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644410508] [2021-12-06 20:58:12,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644410508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200586155] [2021-12-06 20:58:12,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:58:12,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:12,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:12,493 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:12,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 20:58:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 20:58:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:12,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:12,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 20:58:12,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:58:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 28 proven. 122 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 20:58:12,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 45 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 20:58:13,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200586155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:13,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:13,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2021-12-06 20:58:13,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458371335] [2021-12-06 20:58:13,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:13,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 20:58:13,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 20:58:13,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 20:58:13,393 INFO L87 Difference]: Start difference. First operand 663 states and 723 transitions. Second operand has 40 states, 39 states have (on average 6.230769230769231) internal successors, (243), 40 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:14,215 INFO L93 Difference]: Finished difference Result 1270 states and 1368 transitions. [2021-12-06 20:58:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:58:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.230769230769231) internal successors, (243), 40 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-06 20:58:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:14,219 INFO L225 Difference]: With dead ends: 1270 [2021-12-06 20:58:14,219 INFO L226 Difference]: Without dead ends: 1216 [2021-12-06 20:58:14,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 20:58:14,220 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 545 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:14,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1725 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:58:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-06 20:58:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 622. [2021-12-06 20:58:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 619 states have (on average 1.1033925686591277) internal successors, (683), 621 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 683 transitions. [2021-12-06 20:58:14,228 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 683 transitions. Word has length 102 [2021-12-06 20:58:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:14,228 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 683 transitions. [2021-12-06 20:58:14,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.230769230769231) internal successors, (243), 40 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 683 transitions. [2021-12-06 20:58:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:58:14,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:14,229 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:14,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 20:58:14,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 20:58:14,430 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -92157150, now seen corresponding path program 7 times [2021-12-06 20:58:14,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051716704] [2021-12-06 20:58:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:14,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:14,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051716704] [2021-12-06 20:58:14,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051716704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357233917] [2021-12-06 20:58:14,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:58:14,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:14,637 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:14,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 20:58:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:14,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 20:58:14,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:14,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:15,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:58:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357233917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:15,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:15,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2021-12-06 20:58:15,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999688567] [2021-12-06 20:58:15,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:15,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:58:15,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:58:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:58:15,257 INFO L87 Difference]: Start difference. First operand 622 states and 683 transitions. Second operand has 37 states, 36 states have (on average 5.944444444444445) internal successors, (214), 37 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:15,564 INFO L93 Difference]: Finished difference Result 777 states and 864 transitions. [2021-12-06 20:58:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:58:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.944444444444445) internal successors, (214), 37 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 20:58:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:15,567 INFO L225 Difference]: With dead ends: 777 [2021-12-06 20:58:15,567 INFO L226 Difference]: Without dead ends: 771 [2021-12-06 20:58:15,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 20:58:15,568 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 467 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:15,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 650 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:58:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-06 20:58:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 714. [2021-12-06 20:58:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 711 states have (on average 1.1026722925457102) internal successors, (784), 713 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 784 transitions. [2021-12-06 20:58:15,575 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 784 transitions. Word has length 103 [2021-12-06 20:58:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:15,575 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 784 transitions. [2021-12-06 20:58:15,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.944444444444445) internal successors, (214), 37 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 784 transitions. [2021-12-06 20:58:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:58:15,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:15,577 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:15,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 20:58:15,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:15,778 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1276252175, now seen corresponding path program 3 times [2021-12-06 20:58:15,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:15,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70202319] [2021-12-06 20:58:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:15,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 41 proven. 199 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:58:16,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70202319] [2021-12-06 20:58:16,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70202319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674651275] [2021-12-06 20:58:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:58:16,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:16,156 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:16,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 20:58:16,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 20:58:16,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 20:58:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:16,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 20:58:16,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 20:58:16,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:16,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 20:58:17,533 INFO L354 Elim1Store]: treesize reduction 1, result has 97.4 percent of original size [2021-12-06 20:58:17,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-12-06 20:58:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-06 20:58:17,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:19,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2021-12-06 20:58:19,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:19,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2021-12-06 20:58:19,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:58:19,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2021-12-06 20:58:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-06 20:58:19,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674651275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:19,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:19,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 44 [2021-12-06 20:58:19,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119131630] [2021-12-06 20:58:19,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:19,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 20:58:19,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 20:58:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1762, Unknown=1, NotChecked=0, Total=1892 [2021-12-06 20:58:19,760 INFO L87 Difference]: Start difference. First operand 714 states and 784 transitions. Second operand has 44 states, 44 states have (on average 3.9545454545454546) internal successors, (174), 44 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:21,395 INFO L93 Difference]: Finished difference Result 1038 states and 1129 transitions. [2021-12-06 20:58:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 20:58:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.9545454545454546) internal successors, (174), 44 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-06 20:58:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:21,399 INFO L225 Difference]: With dead ends: 1038 [2021-12-06 20:58:21,399 INFO L226 Difference]: Without dead ends: 1030 [2021-12-06 20:58:21,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=595, Invalid=8146, Unknown=1, NotChecked=0, Total=8742 [2021-12-06 20:58:21,400 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 85 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:21,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1506 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 821 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2021-12-06 20:58:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-12-06 20:58:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 684. [2021-12-06 20:58:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 682 states have (on average 1.095307917888563) internal successors, (747), 683 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 747 transitions. [2021-12-06 20:58:21,408 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 747 transitions. Word has length 112 [2021-12-06 20:58:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:21,408 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 747 transitions. [2021-12-06 20:58:21,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.9545454545454546) internal successors, (174), 44 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 747 transitions. [2021-12-06 20:58:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 20:58:21,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:21,409 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:21,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 20:58:21,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:21,610 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1743797747, now seen corresponding path program 8 times [2021-12-06 20:58:21,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:21,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865116272] [2021-12-06 20:58:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:21,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:21,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:21,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865116272] [2021-12-06 20:58:21,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865116272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:21,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766294772] [2021-12-06 20:58:21,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:58:21,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:21,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:21,817 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:21,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 20:58:21,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:58:21,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 20:58:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:22,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:22,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:58:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:22,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:58:22,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:58:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:22,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766294772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:22,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:22,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 37 [2021-12-06 20:58:22,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29838445] [2021-12-06 20:58:22,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:22,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:58:22,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:58:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:58:22,449 INFO L87 Difference]: Start difference. First operand 684 states and 747 transitions. Second operand has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:23,134 INFO L93 Difference]: Finished difference Result 1175 states and 1266 transitions. [2021-12-06 20:58:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 20:58:23,134 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-06 20:58:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:23,137 INFO L225 Difference]: With dead ends: 1175 [2021-12-06 20:58:23,137 INFO L226 Difference]: Without dead ends: 719 [2021-12-06 20:58:23,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=2733, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 20:58:23,138 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 275 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:23,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 1365 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1438 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2021-12-06 20:58:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-12-06 20:58:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 704. [2021-12-06 20:58:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 702 states have (on average 1.0925925925925926) internal successors, (767), 703 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 767 transitions. [2021-12-06 20:58:23,144 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 767 transitions. Word has length 113 [2021-12-06 20:58:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:23,144 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 767 transitions. [2021-12-06 20:58:23,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 767 transitions. [2021-12-06 20:58:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 20:58:23,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:23,146 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:23,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 20:58:23,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 20:58:23,347 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash 732590006, now seen corresponding path program 9 times [2021-12-06 20:58:23,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:23,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817379735] [2021-12-06 20:58:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:23,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:23,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817379735] [2021-12-06 20:58:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817379735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079993809] [2021-12-06 20:58:23,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:58:23,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:23,548 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 20:58:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 20:58:23,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 20:58:23,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:23,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:24,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 20:58:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079993809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:24,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:24,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2021-12-06 20:58:24,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019457773] [2021-12-06 20:58:24,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 20:58:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 20:58:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1924, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:58:24,359 INFO L87 Difference]: Start difference. First operand 704 states and 767 transitions. Second operand has 48 states, 47 states have (on average 6.51063829787234) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:24,699 INFO L93 Difference]: Finished difference Result 839 states and 925 transitions. [2021-12-06 20:58:24,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 20:58:24,699 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.51063829787234) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-06 20:58:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:24,702 INFO L225 Difference]: With dead ends: 839 [2021-12-06 20:58:24,702 INFO L226 Difference]: Without dead ends: 833 [2021-12-06 20:58:24,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=681, Invalid=2741, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 20:58:24,703 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 849 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:24,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 631 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:58:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-12-06 20:58:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2021-12-06 20:58:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 782 states have (on average 1.0907928388746804) internal successors, (853), 783 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 853 transitions. [2021-12-06 20:58:24,710 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 853 transitions. Word has length 117 [2021-12-06 20:58:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:24,710 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 853 transitions. [2021-12-06 20:58:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.51063829787234) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 853 transitions. [2021-12-06 20:58:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 20:58:24,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:24,712 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:24,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 20:58:24,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:24,913 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash -573359737, now seen corresponding path program 10 times [2021-12-06 20:58:24,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:24,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638391428] [2021-12-06 20:58:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:24,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 60 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:25,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638391428] [2021-12-06 20:58:25,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638391428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442695015] [2021-12-06 20:58:25,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:58:25,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:25,168 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:25,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 20:58:25,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:58:25,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:25,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 20:58:25,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:25,288 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:58:25,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:58:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:58:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:58:26,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:26,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-12-06 20:58:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 298 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:26,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:27,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 20:58:27,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:27,318 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 45 treesize of output 39 [2021-12-06 20:58:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 196 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:27,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442695015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:27,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:27,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 27] total 70 [2021-12-06 20:58:27,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328765017] [2021-12-06 20:58:27,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:27,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 20:58:27,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:27,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 20:58:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=4369, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 20:58:27,924 INFO L87 Difference]: Start difference. First operand 784 states and 853 transitions. Second operand has 70 states, 70 states have (on average 5.042857142857143) internal successors, (353), 70 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:28,675 INFO L93 Difference]: Finished difference Result 1355 states and 1458 transitions. [2021-12-06 20:58:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 20:58:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 5.042857142857143) internal successors, (353), 70 states have internal predecessors, (353), 0 states have call successors, (0), 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 127 [2021-12-06 20:58:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:28,678 INFO L225 Difference]: With dead ends: 1355 [2021-12-06 20:58:28,678 INFO L226 Difference]: Without dead ends: 819 [2021-12-06 20:58:28,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=905, Invalid=8025, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 20:58:28,679 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 210 mSDsluCounter, 2014 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2076 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:28,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 2076 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 881 Invalid, 0 Unknown, 238 Unchecked, 0.2s Time] [2021-12-06 20:58:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-12-06 20:58:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 804. [2021-12-06 20:58:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 802 states have (on average 1.0885286783042394) internal successors, (873), 803 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 873 transitions. [2021-12-06 20:58:28,689 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 873 transitions. Word has length 127 [2021-12-06 20:58:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:28,689 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 873 transitions. [2021-12-06 20:58:28,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 5.042857142857143) internal successors, (353), 70 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 873 transitions. [2021-12-06 20:58:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 20:58:28,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:28,691 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:28,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 20:58:28,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 20:58:28,892 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 92641802, now seen corresponding path program 11 times [2021-12-06 20:58:28,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:28,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337009862] [2021-12-06 20:58:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:28,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:29,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337009862] [2021-12-06 20:58:29,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337009862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417665843] [2021-12-06 20:58:29,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:58:29,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:29,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:29,129 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:29,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 20:58:29,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 20:58:29,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:29,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 20:58:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:29,275 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:58:29,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:58:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:29,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:30,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417665843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:30,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:30,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2021-12-06 20:58:30,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331626232] [2021-12-06 20:58:30,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:30,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 20:58:30,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 20:58:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2666, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 20:58:30,511 INFO L87 Difference]: Start difference. First operand 804 states and 873 transitions. Second operand has 56 states, 55 states have (on average 6.6) internal successors, (363), 56 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:30,997 INFO L93 Difference]: Finished difference Result 939 states and 1031 transitions. [2021-12-06 20:58:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:58:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 6.6) internal successors, (363), 56 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-06 20:58:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:31,000 INFO L225 Difference]: With dead ends: 939 [2021-12-06 20:58:31,000 INFO L226 Difference]: Without dead ends: 933 [2021-12-06 20:58:31,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=815, Invalid=3607, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 20:58:31,001 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 761 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:31,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1134 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:58:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-12-06 20:58:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 884. [2021-12-06 20:58:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 882 states have (on average 1.0873015873015872) internal successors, (959), 883 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 959 transitions. [2021-12-06 20:58:31,009 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 959 transitions. Word has length 131 [2021-12-06 20:58:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 959 transitions. [2021-12-06 20:58:31,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 6.6) internal successors, (363), 56 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 959 transitions. [2021-12-06 20:58:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 20:58:31,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:31,011 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:31,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 20:58:31,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 20:58:31,212 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1035171109, now seen corresponding path program 12 times [2021-12-06 20:58:31,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:31,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574621660] [2021-12-06 20:58:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:31,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:31,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574621660] [2021-12-06 20:58:31,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574621660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485298057] [2021-12-06 20:58:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:58:31,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:31,534 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:31,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 20:58:31,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 20:58:31,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 20:58:31,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:31,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:32,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:58:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:32,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:32,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:58:32,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:58:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:32,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485298057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:32,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:32,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 43 [2021-12-06 20:58:32,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681265439] [2021-12-06 20:58:32,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:32,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 20:58:32,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:32,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 20:58:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 20:58:32,311 INFO L87 Difference]: Start difference. First operand 884 states and 959 transitions. Second operand has 43 states, 43 states have (on average 4.906976744186046) internal successors, (211), 43 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:33,115 INFO L93 Difference]: Finished difference Result 1535 states and 1650 transitions. [2021-12-06 20:58:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 20:58:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.906976744186046) internal successors, (211), 43 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-06 20:58:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:33,118 INFO L225 Difference]: With dead ends: 1535 [2021-12-06 20:58:33,118 INFO L226 Difference]: Without dead ends: 919 [2021-12-06 20:58:33,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=3881, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 20:58:33,119 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 632 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:33,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1724 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1882 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2021-12-06 20:58:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-12-06 20:58:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 904. [2021-12-06 20:58:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 902 states have (on average 1.0853658536585367) internal successors, (979), 903 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2021-12-06 20:58:33,127 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 141 [2021-12-06 20:58:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:33,127 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2021-12-06 20:58:33,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.906976744186046) internal successors, (211), 43 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2021-12-06 20:58:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 20:58:33,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:33,128 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:33,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 20:58:33,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:33,330 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash -845264354, now seen corresponding path program 13 times [2021-12-06 20:58:33,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:33,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902642304] [2021-12-06 20:58:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:33,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 91 proven. 458 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:33,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902642304] [2021-12-06 20:58:33,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902642304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986631467] [2021-12-06 20:58:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:58:33,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:33,602 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:33,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 20:58:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 20:58:33,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 120 proven. 429 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:34,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:58:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 120 proven. 429 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:34,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986631467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:34,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:34,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2021-12-06 20:58:34,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153111489] [2021-12-06 20:58:34,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:34,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 20:58:34,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:34,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 20:58:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:58:34,558 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand has 48 states, 47 states have (on average 6.340425531914893) internal successors, (298), 48 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:35,309 INFO L93 Difference]: Finished difference Result 1039 states and 1137 transitions. [2021-12-06 20:58:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:58:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.340425531914893) internal successors, (298), 48 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-06 20:58:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:35,313 INFO L225 Difference]: With dead ends: 1039 [2021-12-06 20:58:35,313 INFO L226 Difference]: Without dead ends: 1033 [2021-12-06 20:58:35,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=841, Invalid=3715, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 20:58:35,313 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1084 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:35,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 1253 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:58:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-12-06 20:58:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 984. [2021-12-06 20:58:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 982 states have (on average 1.084521384928717) internal successors, (1065), 983 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1065 transitions. [2021-12-06 20:58:35,322 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1065 transitions. Word has length 145 [2021-12-06 20:58:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:35,323 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1065 transitions. [2021-12-06 20:58:35,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.340425531914893) internal successors, (298), 48 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1065 transitions. [2021-12-06 20:58:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 20:58:35,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:35,324 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:35,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 20:58:35,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:35,525 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash 690434543, now seen corresponding path program 14 times [2021-12-06 20:58:35,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:35,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862974901] [2021-12-06 20:58:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:35,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 76 proven. 567 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:35,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862974901] [2021-12-06 20:58:35,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862974901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:35,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806643565] [2021-12-06 20:58:35,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:58:35,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:35,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:35,805 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:35,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 20:58:35,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:58:35,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 20:58:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:36,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:58:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 76 proven. 567 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:36,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:58:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:58:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 76 proven. 567 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:36,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806643565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:36,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:36,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 46 [2021-12-06 20:58:36,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983516268] [2021-12-06 20:58:36,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:36,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 20:58:36,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 20:58:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 20:58:36,545 INFO L87 Difference]: Start difference. First operand 984 states and 1065 transitions. Second operand has 46 states, 46 states have (on average 4.978260869565218) internal successors, (229), 46 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:37,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:37,561 INFO L93 Difference]: Finished difference Result 1715 states and 1842 transitions. [2021-12-06 20:58:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 20:58:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.978260869565218) internal successors, (229), 46 states have internal predecessors, (229), 0 states have call successors, (0), 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 155 [2021-12-06 20:58:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:37,566 INFO L225 Difference]: With dead ends: 1715 [2021-12-06 20:58:37,566 INFO L226 Difference]: Without dead ends: 1019 [2021-12-06 20:58:37,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=361, Invalid=4331, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 20:58:37,566 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 380 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2226 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:37,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 2226 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2292 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2021-12-06 20:58:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-12-06 20:58:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1004. [2021-12-06 20:58:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1002 states have (on average 1.0828343313373254) internal successors, (1085), 1003 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1085 transitions. [2021-12-06 20:58:37,575 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1085 transitions. Word has length 155 [2021-12-06 20:58:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:37,575 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1085 transitions. [2021-12-06 20:58:37,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.978260869565218) internal successors, (229), 46 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1085 transitions. [2021-12-06 20:58:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 20:58:37,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:37,577 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:37,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 20:58:37,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 20:58:37,778 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:37,779 INFO L85 PathProgramCache]: Analyzing trace with hash -882147342, now seen corresponding path program 15 times [2021-12-06 20:58:37,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:37,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84213129] [2021-12-06 20:58:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:37,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 120 proven. 560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:38,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:38,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84213129] [2021-12-06 20:58:38,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84213129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68289760] [2021-12-06 20:58:38,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:58:38,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:38,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:38,045 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:38,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 20:58:38,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 20:58:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:38,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 20:58:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 153 proven. 527 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:38,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:39,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 20:58:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 153 proven. 527 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:39,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68289760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:39,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:39,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 62 [2021-12-06 20:58:39,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125015281] [2021-12-06 20:58:39,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:39,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 20:58:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 20:58:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=3326, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 20:58:39,223 INFO L87 Difference]: Start difference. First operand 1004 states and 1085 transitions. Second operand has 63 states, 62 states have (on average 6.774193548387097) internal successors, (420), 63 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:39,712 INFO L93 Difference]: Finished difference Result 1139 states and 1243 transitions. [2021-12-06 20:58:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 20:58:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 6.774193548387097) internal successors, (420), 63 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-12-06 20:58:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:39,716 INFO L225 Difference]: With dead ends: 1139 [2021-12-06 20:58:39,717 INFO L226 Difference]: Without dead ends: 1133 [2021-12-06 20:58:39,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1117, Invalid=4583, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 20:58:39,717 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1322 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:39,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 1026 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:58:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-12-06 20:58:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1084. [2021-12-06 20:58:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1082 states have (on average 1.0822550831792976) internal successors, (1171), 1083 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1171 transitions. [2021-12-06 20:58:39,727 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1171 transitions. Word has length 159 [2021-12-06 20:58:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:39,728 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1171 transitions. [2021-12-06 20:58:39,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 6.774193548387097) internal successors, (420), 63 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1171 transitions. [2021-12-06 20:58:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-06 20:58:39,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:39,729 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:39,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 20:58:39,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 20:58:39,930 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1323684157, now seen corresponding path program 16 times [2021-12-06 20:58:39,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:39,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098667142] [2021-12-06 20:58:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:39,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 84 proven. 700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:40,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098667142] [2021-12-06 20:58:40,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098667142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306169329] [2021-12-06 20:58:40,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:58:40,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:40,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:40,226 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:40,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 20:58:40,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:58:40,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:40,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 20:58:40,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:40,348 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:58:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:58:40,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:58:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:58:41,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 20:58:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 574 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:41,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:42,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 20:58:42,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 20:58:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 498 proven. 286 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:43,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306169329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:43,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:43,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 82 [2021-12-06 20:58:43,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636739230] [2021-12-06 20:58:43,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:43,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 20:58:43,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 20:58:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=6036, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 20:58:43,516 INFO L87 Difference]: Start difference. First operand 1084 states and 1171 transitions. Second operand has 82 states, 82 states have (on average 5.841463414634147) internal successors, (479), 82 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:44,439 INFO L93 Difference]: Finished difference Result 1895 states and 2034 transitions. [2021-12-06 20:58:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 20:58:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.841463414634147) internal successors, (479), 82 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-06 20:58:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:44,443 INFO L225 Difference]: With dead ends: 1895 [2021-12-06 20:58:44,443 INFO L226 Difference]: Without dead ends: 1119 [2021-12-06 20:58:44,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 315 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1135, Invalid=10855, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 20:58:44,444 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 194 mSDsluCounter, 3110 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:44,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 3195 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1191 Invalid, 0 Unknown, 194 Unchecked, 0.3s Time] [2021-12-06 20:58:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-12-06 20:58:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1104. [2021-12-06 20:58:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1102 states have (on average 1.0807622504537204) internal successors, (1191), 1103 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1191 transitions. [2021-12-06 20:58:44,453 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1191 transitions. Word has length 169 [2021-12-06 20:58:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:44,453 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1191 transitions. [2021-12-06 20:58:44,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.841463414634147) internal successors, (479), 82 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1191 transitions. [2021-12-06 20:58:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 20:58:44,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:44,455 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:44,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 20:58:44,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:44,656 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash -196068474, now seen corresponding path program 17 times [2021-12-06 20:58:44,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:44,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261974400] [2021-12-06 20:58:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:44,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 153 proven. 672 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:44,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:44,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261974400] [2021-12-06 20:58:44,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261974400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:44,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491065647] [2021-12-06 20:58:44,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:58:44,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:44,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:44,977 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:44,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 20:58:45,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 20:58:45,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 20:58:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:45,181 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:58:45,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:58:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 190 proven. 635 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:46,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 231 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:47,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491065647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:47,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:47,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2021-12-06 20:58:47,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128780128] [2021-12-06 20:58:47,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:47,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 20:58:47,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 20:58:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=4709, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 20:58:47,045 INFO L87 Difference]: Start difference. First operand 1104 states and 1191 transitions. Second operand has 74 states, 73 states have (on average 6.698630136986301) internal successors, (489), 74 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:47,793 INFO L93 Difference]: Finished difference Result 1239 states and 1349 transitions. [2021-12-06 20:58:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 20:58:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 6.698630136986301) internal successors, (489), 74 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-06 20:58:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:47,797 INFO L225 Difference]: With dead ends: 1239 [2021-12-06 20:58:47,797 INFO L226 Difference]: Without dead ends: 1233 [2021-12-06 20:58:47,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1352, Invalid=6304, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 20:58:47,798 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1241 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:47,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 1990 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:58:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-12-06 20:58:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1184. [2021-12-06 20:58:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1182 states have (on average 1.0803722504230118) internal successors, (1277), 1183 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1277 transitions. [2021-12-06 20:58:47,808 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1277 transitions. Word has length 173 [2021-12-06 20:58:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1277 transitions. [2021-12-06 20:58:47,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 6.698630136986301) internal successors, (489), 74 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1277 transitions. [2021-12-06 20:58:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 20:58:47,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:47,810 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:47,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 20:58:48,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-06 20:58:48,011 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 801669463, now seen corresponding path program 18 times [2021-12-06 20:58:48,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129970497] [2021-12-06 20:58:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:48,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 92 proven. 847 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:48,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:48,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129970497] [2021-12-06 20:58:48,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129970497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:48,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76213901] [2021-12-06 20:58:48,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:58:48,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:48,337 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:48,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 20:58:48,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 20:58:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 20:58:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:49,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:58:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 92 proven. 847 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:49,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:49,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:58:49,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:58:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 92 proven. 847 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:49,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76213901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:49,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:49,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 52 [2021-12-06 20:58:49,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752515822] [2021-12-06 20:58:49,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:49,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 20:58:49,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:49,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 20:58:49,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2500, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 20:58:49,392 INFO L87 Difference]: Start difference. First operand 1184 states and 1277 transitions. Second operand has 52 states, 52 states have (on average 5.096153846153846) internal successors, (265), 52 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:50,782 INFO L93 Difference]: Finished difference Result 2075 states and 2226 transitions. [2021-12-06 20:58:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 20:58:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.096153846153846) internal successors, (265), 52 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-12-06 20:58:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:50,787 INFO L225 Difference]: With dead ends: 2075 [2021-12-06 20:58:50,787 INFO L226 Difference]: Without dead ends: 1219 [2021-12-06 20:58:50,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 343 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=502, Invalid=5978, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 20:58:50,787 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 702 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 3419 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 3157 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:50,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 3157 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3419 Invalid, 0 Unknown, 114 Unchecked, 0.8s Time] [2021-12-06 20:58:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-12-06 20:58:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1204. [2021-12-06 20:58:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1202 states have (on average 1.079034941763727) internal successors, (1297), 1203 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1297 transitions. [2021-12-06 20:58:50,800 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1297 transitions. Word has length 183 [2021-12-06 20:58:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:50,801 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1297 transitions. [2021-12-06 20:58:50,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.096153846153846) internal successors, (265), 52 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1297 transitions. [2021-12-06 20:58:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-06 20:58:50,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:50,802 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:50,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 20:58:51,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:51,003 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:51,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1469807834, now seen corresponding path program 19 times [2021-12-06 20:58:51,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:51,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059236911] [2021-12-06 20:58:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:51,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 190 proven. 794 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:51,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:51,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059236911] [2021-12-06 20:58:51,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059236911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:51,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523035646] [2021-12-06 20:58:51,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:58:51,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:51,322 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:51,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 20:58:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:51,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 20:58:51,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 231 proven. 753 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:51,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:52,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:58:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 231 proven. 753 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523035646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:52,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:52,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2021-12-06 20:58:52,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959985246] [2021-12-06 20:58:52,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:52,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 20:58:52,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 20:58:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=3185, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 20:58:52,569 INFO L87 Difference]: Start difference. First operand 1204 states and 1297 transitions. Second operand has 60 states, 59 states have (on average 6.47457627118644) internal successors, (382), 60 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:53,732 INFO L93 Difference]: Finished difference Result 1339 states and 1455 transitions. [2021-12-06 20:58:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:58:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 6.47457627118644) internal successors, (382), 60 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-06 20:58:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:53,736 INFO L225 Difference]: With dead ends: 1339 [2021-12-06 20:58:53,736 INFO L226 Difference]: Without dead ends: 1333 [2021-12-06 20:58:53,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1336, Invalid=5974, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 20:58:53,737 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1539 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:53,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1539 Valid, 1713 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:58:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-12-06 20:58:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1284. [2021-12-06 20:58:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1282 states have (on average 1.078783151326053) internal successors, (1383), 1283 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1383 transitions. [2021-12-06 20:58:53,748 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1383 transitions. Word has length 187 [2021-12-06 20:58:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:53,748 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 1383 transitions. [2021-12-06 20:58:53,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 6.47457627118644) internal successors, (382), 60 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1383 transitions. [2021-12-06 20:58:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-06 20:58:53,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:53,750 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:53,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-06 20:58:53,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:53,951 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash 499198379, now seen corresponding path program 20 times [2021-12-06 20:58:53,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:53,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135138977] [2021-12-06 20:58:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:53,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 100 proven. 1008 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:54,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:54,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135138977] [2021-12-06 20:58:54,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135138977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:54,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333265562] [2021-12-06 20:58:54,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:58:54,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:54,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:54,321 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:54,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 20:58:54,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:58:54,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:54,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 20:58:54,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:54,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:58:55,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:58:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 100 proven. 1008 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:55,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:58:55,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:58:55,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:58:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 100 proven. 1008 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:56,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333265562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:58:56,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:58:56,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 82 [2021-12-06 20:58:56,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089024402] [2021-12-06 20:58:56,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:58:56,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 20:58:56,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 20:58:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6341, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 20:58:56,326 INFO L87 Difference]: Start difference. First operand 1284 states and 1383 transitions. Second operand has 82 states, 82 states have (on average 5.341463414634147) internal successors, (438), 82 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:58,346 INFO L93 Difference]: Finished difference Result 2255 states and 2418 transitions. [2021-12-06 20:58:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 20:58:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.341463414634147) internal successors, (438), 82 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-06 20:58:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:58,350 INFO L225 Difference]: With dead ends: 2255 [2021-12-06 20:58:58,350 INFO L226 Difference]: Without dead ends: 1319 [2021-12-06 20:58:58,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=749, Invalid=11907, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 20:58:58,351 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 710 mSDsluCounter, 4362 mSDsCounter, 0 mSdLazyCounter, 5002 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 4463 SdHoareTripleChecker+Invalid, 5258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 5002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:58,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 4463 Invalid, 5258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 5002 Invalid, 0 Unknown, 160 Unchecked, 1.1s Time] [2021-12-06 20:58:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-12-06 20:58:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1304. [2021-12-06 20:58:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1302 states have (on average 1.077572964669739) internal successors, (1403), 1303 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1403 transitions. [2021-12-06 20:58:58,361 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1403 transitions. Word has length 197 [2021-12-06 20:58:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:58,361 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1403 transitions. [2021-12-06 20:58:58,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.341463414634147) internal successors, (438), 82 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:58:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1403 transitions. [2021-12-06 20:58:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 20:58:58,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:58,363 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:58:58,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 20:58:58,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 20:58:58,564 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:58:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1250444270, now seen corresponding path program 21 times [2021-12-06 20:58:58,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:58,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246899029] [2021-12-06 20:58:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:58,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 231 proven. 926 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:58:58,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246899029] [2021-12-06 20:58:58,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246899029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438693697] [2021-12-06 20:58:58,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:58:58,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:58,933 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:58,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 20:58:59,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 20:58:59,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:58:59,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 20:58:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:59,330 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:58:59,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:59:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 276 proven. 881 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:00,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 325 proven. 832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:01,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438693697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:01,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:01,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 90 [2021-12-06 20:59:01,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512683634] [2021-12-06 20:59:01,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:01,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 20:59:01,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 20:59:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=7144, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 20:59:01,741 INFO L87 Difference]: Start difference. First operand 1304 states and 1403 transitions. Second operand has 91 states, 90 states have (on average 6.611111111111111) internal successors, (595), 91 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:03,181 INFO L93 Difference]: Finished difference Result 1439 states and 1561 transitions. [2021-12-06 20:59:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 20:59:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 6.611111111111111) internal successors, (595), 91 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-12-06 20:59:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:03,186 INFO L225 Difference]: With dead ends: 1439 [2021-12-06 20:59:03,186 INFO L226 Difference]: Without dead ends: 1433 [2021-12-06 20:59:03,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2637, Invalid=11405, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 20:59:03,186 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 1625 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:03,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1625 Valid, 1581 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:59:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-12-06 20:59:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1384. [2021-12-06 20:59:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1382 states have (on average 1.077424023154848) internal successors, (1489), 1383 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1489 transitions. [2021-12-06 20:59:03,198 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1489 transitions. Word has length 201 [2021-12-06 20:59:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:03,198 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1489 transitions. [2021-12-06 20:59:03,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 6.611111111111111) internal successors, (595), 91 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1489 transitions. [2021-12-06 20:59:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-06 20:59:03,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:03,200 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:03,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 20:59:03,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:03,401 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1031854145, now seen corresponding path program 22 times [2021-12-06 20:59:03,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:03,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523722268] [2021-12-06 20:59:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:03,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 108 proven. 1183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:03,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523722268] [2021-12-06 20:59:03,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523722268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381082428] [2021-12-06 20:59:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:59:03,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:03,827 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:03,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 20:59:03,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:59:03,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:03,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 20:59:03,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:03,971 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:59:03,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:59:04,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:59:05,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:59:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 20:59:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 940 proven. 351 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:05,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:07,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 20:59:07,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 20:59:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 840 proven. 451 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:08,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381082428] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:08,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:08,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 100 [2021-12-06 20:59:08,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826484981] [2021-12-06 20:59:08,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:08,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-06 20:59:08,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:08,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-06 20:59:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=9015, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 20:59:08,262 INFO L87 Difference]: Start difference. First operand 1384 states and 1489 transitions. Second operand has 100 states, 100 states have (on average 6.05) internal successors, (605), 100 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:09,681 INFO L93 Difference]: Finished difference Result 2435 states and 2610 transitions. [2021-12-06 20:59:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 20:59:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 6.05) internal successors, (605), 100 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-12-06 20:59:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:09,686 INFO L225 Difference]: With dead ends: 2435 [2021-12-06 20:59:09,686 INFO L226 Difference]: Without dead ends: 1419 [2021-12-06 20:59:09,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5368 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1664, Invalid=16426, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 20:59:09,687 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 292 mSDsluCounter, 4382 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 4488 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:09,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 4488 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1969 Invalid, 0 Unknown, 442 Unchecked, 0.5s Time] [2021-12-06 20:59:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-12-06 20:59:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1404. [2021-12-06 20:59:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1402 states have (on average 1.0763195435092725) internal successors, (1509), 1403 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1509 transitions. [2021-12-06 20:59:09,698 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1509 transitions. Word has length 211 [2021-12-06 20:59:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:09,698 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1509 transitions. [2021-12-06 20:59:09,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 6.05) internal successors, (605), 100 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1509 transitions. [2021-12-06 20:59:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 20:59:09,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:09,700 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:09,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-06 20:59:09,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 20:59:09,901 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1413320898, now seen corresponding path program 23 times [2021-12-06 20:59:09,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:09,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544710891] [2021-12-06 20:59:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:09,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 276 proven. 1068 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:10,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:10,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544710891] [2021-12-06 20:59:10,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544710891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:10,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546558612] [2021-12-06 20:59:10,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:59:10,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:10,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:10,358 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:10,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 20:59:10,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 20:59:10,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 20:59:10,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:10,639 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:59:10,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:59:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 325 proven. 1019 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:11,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 378 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:13,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546558612] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:13,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:13,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 93 [2021-12-06 20:59:13,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419768118] [2021-12-06 20:59:13,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:13,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 20:59:13,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 20:59:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=7620, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 20:59:13,078 INFO L87 Difference]: Start difference. First operand 1404 states and 1509 transitions. Second operand has 94 states, 93 states have (on average 6.741935483870968) internal successors, (627), 94 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:14,106 INFO L93 Difference]: Finished difference Result 1539 states and 1667 transitions. [2021-12-06 20:59:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 20:59:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 6.741935483870968) internal successors, (627), 94 states have internal predecessors, (627), 0 states have call successors, (0), 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 215 [2021-12-06 20:59:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:14,111 INFO L225 Difference]: With dead ends: 1539 [2021-12-06 20:59:14,112 INFO L226 Difference]: Without dead ends: 1533 [2021-12-06 20:59:14,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4177 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2136, Invalid=10074, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 20:59:14,112 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1374 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 2942 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:14,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1374 Valid, 2558 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:59:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-12-06 20:59:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1484. [2021-12-06 20:59:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1482 states have (on average 1.0762483130904184) internal successors, (1595), 1483 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 1595 transitions. [2021-12-06 20:59:14,124 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 1595 transitions. Word has length 215 [2021-12-06 20:59:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:14,124 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 1595 transitions. [2021-12-06 20:59:14,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 6.741935483870968) internal successors, (627), 94 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 1595 transitions. [2021-12-06 20:59:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-06 20:59:14,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:14,126 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:14,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 20:59:14,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 20:59:14,327 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:14,328 INFO L85 PathProgramCache]: Analyzing trace with hash 543783827, now seen corresponding path program 24 times [2021-12-06 20:59:14,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:14,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75761352] [2021-12-06 20:59:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:14,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 116 proven. 1372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:14,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:14,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75761352] [2021-12-06 20:59:14,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75761352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:14,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317599344] [2021-12-06 20:59:14,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:59:14,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:14,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:14,802 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:14,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 20:59:15,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 20:59:15,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 20:59:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:15,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:59:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:59:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 116 proven. 1372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:16,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:16,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:59:16,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:59:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 116 proven. 1372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317599344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:16,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:16,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 61 [2021-12-06 20:59:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580675469] [2021-12-06 20:59:16,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:16,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 20:59:16,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 20:59:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 20:59:16,471 INFO L87 Difference]: Start difference. First operand 1484 states and 1595 transitions. Second operand has 61 states, 61 states have (on average 5.229508196721311) internal successors, (319), 61 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:18,388 INFO L93 Difference]: Finished difference Result 2615 states and 2802 transitions. [2021-12-06 20:59:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 20:59:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.229508196721311) internal successors, (319), 61 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-12-06 20:59:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:18,392 INFO L225 Difference]: With dead ends: 2615 [2021-12-06 20:59:18,392 INFO L226 Difference]: Without dead ends: 1519 [2021-12-06 20:59:18,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 424 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=595, Invalid=8525, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 20:59:18,393 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 707 mSDsluCounter, 4141 mSDsCounter, 0 mSdLazyCounter, 4733 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 4911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:18,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 4256 Invalid, 4911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4733 Invalid, 0 Unknown, 88 Unchecked, 1.0s Time] [2021-12-06 20:59:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-12-06 20:59:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1504. [2021-12-06 20:59:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1502 states have (on average 1.0752330226364848) internal successors, (1615), 1503 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1615 transitions. [2021-12-06 20:59:18,403 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1615 transitions. Word has length 225 [2021-12-06 20:59:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:18,403 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 1615 transitions. [2021-12-06 20:59:18,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.229508196721311) internal successors, (319), 61 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1615 transitions. [2021-12-06 20:59:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-06 20:59:18,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:18,405 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:18,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 20:59:18,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 20:59:18,606 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash -640785578, now seen corresponding path program 25 times [2021-12-06 20:59:18,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436032689] [2021-12-06 20:59:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:18,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 325 proven. 1220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:19,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436032689] [2021-12-06 20:59:19,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436032689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552112833] [2021-12-06 20:59:19,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:59:19,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:19,087 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:19,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 20:59:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 20:59:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 378 proven. 1167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:19,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:20,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:59:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 378 proven. 1167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:20,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552112833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:20,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:20,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 72 [2021-12-06 20:59:20,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734773823] [2021-12-06 20:59:20,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:20,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 20:59:20,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 20:59:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=4614, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 20:59:20,764 INFO L87 Difference]: Start difference. First operand 1504 states and 1615 transitions. Second operand has 73 states, 72 states have (on average 6.472222222222222) internal successors, (466), 73 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:22,026 INFO L93 Difference]: Finished difference Result 1639 states and 1773 transitions. [2021-12-06 20:59:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 20:59:22,027 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 6.472222222222222) internal successors, (466), 73 states have internal predecessors, (466), 0 states have call successors, (0), 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 229 [2021-12-06 20:59:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:22,029 INFO L225 Difference]: With dead ends: 1639 [2021-12-06 20:59:22,029 INFO L226 Difference]: Without dead ends: 1633 [2021-12-06 20:59:22,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 20:59:22,030 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 2370 mSDsluCounter, 2548 mSDsCounter, 0 mSdLazyCounter, 3212 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2370 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 3442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 3212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:22,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2370 Valid, 2671 Invalid, 3442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 3212 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:59:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-12-06 20:59:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1584. [2021-12-06 20:59:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1582 states have (on average 1.075221238938053) internal successors, (1701), 1583 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 1701 transitions. [2021-12-06 20:59:22,040 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 1701 transitions. Word has length 229 [2021-12-06 20:59:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:22,040 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 1701 transitions. [2021-12-06 20:59:22,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 6.472222222222222) internal successors, (466), 73 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 1701 transitions. [2021-12-06 20:59:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 20:59:22,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:22,042 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:22,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 20:59:22,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 20:59:22,243 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1596775129, now seen corresponding path program 26 times [2021-12-06 20:59:22,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:22,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075967156] [2021-12-06 20:59:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:22,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 124 proven. 1575 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:22,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075967156] [2021-12-06 20:59:22,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075967156] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:22,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455362395] [2021-12-06 20:59:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:59:22,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:22,745 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:22,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 20:59:22,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:59:22,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 20:59:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:23,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:59:23,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:59:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 124 proven. 1575 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:23,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:23,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:59:23,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:59:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 124 proven. 1575 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:24,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455362395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:24,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:24,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 64 [2021-12-06 20:59:24,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141226314] [2021-12-06 20:59:24,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:24,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 20:59:24,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 20:59:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3848, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 20:59:24,067 INFO L87 Difference]: Start difference. First operand 1584 states and 1701 transitions. Second operand has 64 states, 64 states have (on average 5.265625) internal successors, (337), 64 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:26,393 INFO L93 Difference]: Finished difference Result 2795 states and 2994 transitions. [2021-12-06 20:59:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 20:59:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.265625) internal successors, (337), 64 states have internal predecessors, (337), 0 states have call successors, (0), 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 239 [2021-12-06 20:59:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:26,396 INFO L225 Difference]: With dead ends: 2795 [2021-12-06 20:59:26,396 INFO L226 Difference]: Without dead ends: 1619 [2021-12-06 20:59:26,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 466 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=626, Invalid=9474, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 20:59:26,397 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 881 mSDsluCounter, 5046 mSDsCounter, 0 mSdLazyCounter, 5755 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 5168 SdHoareTripleChecker+Invalid, 6065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 5755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:26,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 5168 Invalid, 6065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 5755 Invalid, 0 Unknown, 213 Unchecked, 1.3s Time] [2021-12-06 20:59:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-12-06 20:59:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1604. [2021-12-06 20:59:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1602 states have (on average 1.0742821473158553) internal successors, (1721), 1603 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 1721 transitions. [2021-12-06 20:59:26,410 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 1721 transitions. Word has length 239 [2021-12-06 20:59:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:26,411 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 1721 transitions. [2021-12-06 20:59:26,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.265625) internal successors, (337), 64 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 1721 transitions. [2021-12-06 20:59:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-06 20:59:26,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:26,413 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:26,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 20:59:26,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:26,614 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:26,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1975927894, now seen corresponding path program 27 times [2021-12-06 20:59:26,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:26,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583184950] [2021-12-06 20:59:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:26,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 378 proven. 1382 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:27,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583184950] [2021-12-06 20:59:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583184950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588340157] [2021-12-06 20:59:27,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:59:27,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:27,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:27,110 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:27,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 20:59:27,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 20:59:27,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 20:59:27,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:27,866 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:59:27,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:59:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 435 proven. 1325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:29,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 496 proven. 1264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:30,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588340157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:30,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:30,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2021-12-06 20:59:30,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318210793] [2021-12-06 20:59:30,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:30,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 20:59:30,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 20:59:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1697, Invalid=10293, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 20:59:30,849 INFO L87 Difference]: Start difference. First operand 1604 states and 1721 transitions. Second operand has 110 states, 109 states have (on average 6.614678899082569) internal successors, (721), 110 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:31,976 INFO L93 Difference]: Finished difference Result 1739 states and 1879 transitions. [2021-12-06 20:59:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 20:59:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 6.614678899082569) internal successors, (721), 110 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-12-06 20:59:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:31,978 INFO L225 Difference]: With dead ends: 1739 [2021-12-06 20:59:31,978 INFO L226 Difference]: Without dead ends: 1733 [2021-12-06 20:59:31,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5433 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3151, Invalid=13361, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 20:59:31,979 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 3248 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3248 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:31,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3248 Valid, 1833 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:59:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2021-12-06 20:59:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1684. [2021-12-06 20:59:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1682 states have (on average 1.0743162901307968) internal successors, (1807), 1683 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 1807 transitions. [2021-12-06 20:59:31,990 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 1807 transitions. Word has length 243 [2021-12-06 20:59:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:31,990 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 1807 transitions. [2021-12-06 20:59:31,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 6.614678899082569) internal successors, (721), 110 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 1807 transitions. [2021-12-06 20:59:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-06 20:59:31,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:31,992 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:32,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 20:59:32,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-12-06 20:59:32,193 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2147165307, now seen corresponding path program 28 times [2021-12-06 20:59:32,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:32,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957817534] [2021-12-06 20:59:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:32,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 132 proven. 1792 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:32,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:32,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957817534] [2021-12-06 20:59:32,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957817534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272047100] [2021-12-06 20:59:32,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:59:32,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:32,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:32,727 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:32,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 20:59:32,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:59:32,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:32,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 20:59:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:32,890 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:59:32,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:59:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:59:35,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:59:35,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 20:59:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1396 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:35,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:37,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 20:59:37,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 20:59:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1272 proven. 652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:38,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272047100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:38,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:38,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 118 [2021-12-06 20:59:38,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168943092] [2021-12-06 20:59:38,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:38,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-12-06 20:59:38,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-12-06 20:59:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1218, Invalid=12588, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 20:59:38,648 INFO L87 Difference]: Start difference. First operand 1684 states and 1807 transitions. Second operand has 118 states, 118 states have (on average 6.194915254237288) internal successors, (731), 118 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:40,418 INFO L93 Difference]: Finished difference Result 2975 states and 3186 transitions. [2021-12-06 20:59:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 20:59:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 6.194915254237288) internal successors, (731), 118 states have internal predecessors, (731), 0 states have call successors, (0), 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 253 [2021-12-06 20:59:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:40,420 INFO L225 Difference]: With dead ends: 2975 [2021-12-06 20:59:40,420 INFO L226 Difference]: Without dead ends: 1719 [2021-12-06 20:59:40,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 477 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7490 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2209, Invalid=22597, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 20:59:40,421 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 314 mSDsluCounter, 4906 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 5033 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:40,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 5033 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2426 Invalid, 0 Unknown, 278 Unchecked, 0.6s Time] [2021-12-06 20:59:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-12-06 20:59:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1704. [2021-12-06 20:59:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1702 states have (on average 1.073443008225617) internal successors, (1827), 1703 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 1827 transitions. [2021-12-06 20:59:40,432 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 1827 transitions. Word has length 253 [2021-12-06 20:59:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:40,432 INFO L470 AbstractCegarLoop]: Abstraction has 1704 states and 1827 transitions. [2021-12-06 20:59:40,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 6.194915254237288) internal successors, (731), 118 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 1827 transitions. [2021-12-06 20:59:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-06 20:59:40,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:40,434 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:40,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 20:59:40,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:40,635 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:40,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1972725314, now seen corresponding path program 29 times [2021-12-06 20:59:40,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:40,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361238901] [2021-12-06 20:59:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:40,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 435 proven. 1554 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:41,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361238901] [2021-12-06 20:59:41,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361238901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953072419] [2021-12-06 20:59:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:59:41,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:41,220 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:41,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 20:59:41,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 20:59:41,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:41,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 20:59:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:41,584 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:59:41,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 20:59:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 496 proven. 1493 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:42,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 561 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:44,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953072419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:44,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:44,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 111 [2021-12-06 20:59:44,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879821494] [2021-12-06 20:59:44,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:44,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-12-06 20:59:44,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-12-06 20:59:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1560, Invalid=10872, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 20:59:44,869 INFO L87 Difference]: Start difference. First operand 1704 states and 1827 transitions. Second operand has 112 states, 111 states have (on average 6.783783783783784) internal successors, (753), 112 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:46,547 INFO L93 Difference]: Finished difference Result 1839 states and 1985 transitions. [2021-12-06 20:59:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 20:59:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 6.783783783783784) internal successors, (753), 112 states have internal predecessors, (753), 0 states have call successors, (0), 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 257 [2021-12-06 20:59:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:46,550 INFO L225 Difference]: With dead ends: 1839 [2021-12-06 20:59:46,550 INFO L226 Difference]: Without dead ends: 1833 [2021-12-06 20:59:46,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6013 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2964, Invalid=14328, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 20:59:46,551 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 2034 mSDsluCounter, 3858 mSDsCounter, 0 mSdLazyCounter, 4690 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2034 SdHoareTripleChecker+Valid, 3995 SdHoareTripleChecker+Invalid, 4884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 4690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:46,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2034 Valid, 3995 Invalid, 4884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 4690 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 20:59:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-12-06 20:59:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1784. [2021-12-06 20:59:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1782 states have (on average 1.0735129068462401) internal successors, (1913), 1783 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1913 transitions. [2021-12-06 20:59:46,566 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1913 transitions. Word has length 257 [2021-12-06 20:59:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:46,567 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 1913 transitions. [2021-12-06 20:59:46,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 6.783783783783784) internal successors, (753), 112 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1913 transitions. [2021-12-06 20:59:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-06 20:59:46,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:46,569 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:46,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 20:59:46,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:46,771 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash -116622961, now seen corresponding path program 30 times [2021-12-06 20:59:46,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:46,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861462553] [2021-12-06 20:59:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:46,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 140 proven. 2023 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:47,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:47,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861462553] [2021-12-06 20:59:47,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861462553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:47,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676290360] [2021-12-06 20:59:47,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:59:47,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:47,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:47,323 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:47,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 20:59:48,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 20:59:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:48,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 20:59:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:48,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:59:49,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:59:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 140 proven. 2023 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:49,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:59:49,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:59:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 140 proven. 2023 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:49,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676290360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:49,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:49,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 70 [2021-12-06 20:59:49,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065742039] [2021-12-06 20:59:49,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:49,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 20:59:49,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:49,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 20:59:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4630, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 20:59:49,715 INFO L87 Difference]: Start difference. First operand 1784 states and 1913 transitions. Second operand has 70 states, 70 states have (on average 5.328571428571428) internal successors, (373), 70 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:52,483 INFO L93 Difference]: Finished difference Result 3155 states and 3378 transitions. [2021-12-06 20:59:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 20:59:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 5.328571428571428) internal successors, (373), 70 states have internal predecessors, (373), 0 states have call successors, (0), 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 267 [2021-12-06 20:59:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:52,485 INFO L225 Difference]: With dead ends: 3155 [2021-12-06 20:59:52,485 INFO L226 Difference]: Without dead ends: 1819 [2021-12-06 20:59:52,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 505 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=688, Invalid=11522, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 20:59:52,486 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 1022 mSDsluCounter, 5978 mSDsCounter, 0 mSdLazyCounter, 6886 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 6114 SdHoareTripleChecker+Invalid, 7150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 6886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:52,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 6114 Invalid, 7150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 6886 Invalid, 0 Unknown, 139 Unchecked, 1.5s Time] [2021-12-06 20:59:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-12-06 20:59:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1804. [2021-12-06 20:59:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1802 states have (on average 1.0726970033296337) internal successors, (1933), 1803 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 1933 transitions. [2021-12-06 20:59:52,496 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 1933 transitions. Word has length 267 [2021-12-06 20:59:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:52,496 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 1933 transitions. [2021-12-06 20:59:52,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 5.328571428571428) internal successors, (373), 70 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 1933 transitions. [2021-12-06 20:59:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-06 20:59:52,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:52,499 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:52,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 20:59:52,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-06 20:59:52,700 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1631059346, now seen corresponding path program 31 times [2021-12-06 20:59:52,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:52,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594661821] [2021-12-06 20:59:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:52,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 496 proven. 1736 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:53,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594661821] [2021-12-06 20:59:53,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594661821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944463635] [2021-12-06 20:59:53,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:59:53,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:53,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:53,303 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:53,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 20:59:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:53,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-06 20:59:53,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 561 proven. 1671 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:55,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:59:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 561 proven. 1671 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:55,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944463635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:55,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:55,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 84 [2021-12-06 20:59:55,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837312393] [2021-12-06 20:59:55,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:55,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 20:59:55,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 20:59:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=6270, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 20:59:55,343 INFO L87 Difference]: Start difference. First operand 1804 states and 1933 transitions. Second operand has 85 states, 84 states have (on average 6.5476190476190474) internal successors, (550), 85 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:56,835 INFO L93 Difference]: Finished difference Result 1939 states and 2091 transitions. [2021-12-06 20:59:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 20:59:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 6.5476190476190474) internal successors, (550), 85 states have internal predecessors, (550), 0 states have call successors, (0), 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 271 [2021-12-06 20:59:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:56,838 INFO L225 Difference]: With dead ends: 1939 [2021-12-06 20:59:56,838 INFO L226 Difference]: Without dead ends: 1933 [2021-12-06 20:59:56,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 496 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2025, Invalid=9105, Unknown=0, NotChecked=0, Total=11130 [2021-12-06 20:59:56,838 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1713 mSDsluCounter, 3412 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 4315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:56,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 3556 Invalid, 4315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:59:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-12-06 20:59:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1884. [2021-12-06 20:59:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1882 states have (on average 1.0727948990435707) internal successors, (2019), 1883 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2019 transitions. [2021-12-06 20:59:56,851 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2019 transitions. Word has length 271 [2021-12-06 20:59:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:56,851 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 2019 transitions. [2021-12-06 20:59:56,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 6.5476190476190474) internal successors, (550), 85 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2019 transitions. [2021-12-06 20:59:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-06 20:59:56,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:56,854 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:56,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 20:59:57,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:57,054 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 20:59:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:57,055 INFO L85 PathProgramCache]: Analyzing trace with hash 840836195, now seen corresponding path program 32 times [2021-12-06 20:59:57,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199819311] [2021-12-06 20:59:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:57,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 148 proven. 2268 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:57,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199819311] [2021-12-06 20:59:57,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199819311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897587205] [2021-12-06 20:59:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:59:57,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:57,623 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:57,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 20:59:57,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:59:57,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:59:57,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 20:59:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:58,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 20:59:58,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 20:59:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 148 proven. 2268 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:58,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:59:58,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 20:59:58,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 20:59:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 148 proven. 2268 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:59:58,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897587205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:59:58,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:59:58,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 73 [2021-12-06 20:59:58,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795933] [2021-12-06 20:59:58,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:59:58,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 20:59:58,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 20:59:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5048, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 20:59:58,978 INFO L87 Difference]: Start difference. First operand 1884 states and 2019 transitions. Second operand has 73 states, 73 states have (on average 5.3561643835616435) internal successors, (391), 73 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:02,398 INFO L93 Difference]: Finished difference Result 3335 states and 3570 transitions. [2021-12-06 21:00:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 21:00:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 5.3561643835616435) internal successors, (391), 73 states have internal predecessors, (391), 0 states have call successors, (0), 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 281 [2021-12-06 21:00:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:02,401 INFO L225 Difference]: With dead ends: 3335 [2021-12-06 21:00:02,401 INFO L226 Difference]: Without dead ends: 1919 [2021-12-06 21:00:02,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 532 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=719, Invalid=12621, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 21:00:02,401 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 915 mSDsluCounter, 7736 mSDsCounter, 0 mSdLazyCounter, 8973 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 7879 SdHoareTripleChecker+Invalid, 9089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 8973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:02,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 7879 Invalid, 9089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 8973 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 21:00:02,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-12-06 21:00:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1904. [2021-12-06 21:00:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1902 states have (on average 1.0720294426919033) internal successors, (2039), 1903 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 2039 transitions. [2021-12-06 21:00:02,413 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 2039 transitions. Word has length 281 [2021-12-06 21:00:02,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:02,413 INFO L470 AbstractCegarLoop]: Abstraction has 1904 states and 2039 transitions. [2021-12-06 21:00:02,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 5.3561643835616435) internal successors, (391), 73 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 2039 transitions. [2021-12-06 21:00:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-06 21:00:02,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:02,416 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:02,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 21:00:02,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 21:00:02,617 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 21:00:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1553668314, now seen corresponding path program 33 times [2021-12-06 21:00:02,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732937587] [2021-12-06 21:00:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:02,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 561 proven. 1928 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:00:03,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732937587] [2021-12-06 21:00:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732937587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:00:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105933019] [2021-12-06 21:00:03,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:00:03,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:00:03,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:00:03,308 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:00:03,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 21:00:04,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-06 21:00:04,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:00:04,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 21:00:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:04,227 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:00:04,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 21:00:04,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 21:00:04,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:00:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 21:00:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2306 trivial. 0 not checked. [2021-12-06 21:00:04,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:00:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 21:00:06,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 21:00:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2306 trivial. 0 not checked. [2021-12-06 21:00:06,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105933019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:00:06,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:00:06,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 8, 8] total 56 [2021-12-06 21:00:06,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521152767] [2021-12-06 21:00:06,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:00:06,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 21:00:06,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:06,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 21:00:06,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=2757, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 21:00:06,611 INFO L87 Difference]: Start difference. First operand 1904 states and 2039 transitions. Second operand has 57 states, 56 states have (on average 6.375) internal successors, (357), 57 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:08,642 INFO L93 Difference]: Finished difference Result 1951 states and 2087 transitions. [2021-12-06 21:00:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 21:00:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 6.375) internal successors, (357), 57 states have internal predecessors, (357), 0 states have call successors, (0), 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 285 [2021-12-06 21:00:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:08,642 INFO L225 Difference]: With dead ends: 1951 [2021-12-06 21:00:08,642 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 21:00:08,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2304, Invalid=7998, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 21:00:08,643 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 2169 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:08,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2169 Valid, 2825 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2912 Invalid, 0 Unknown, 46 Unchecked, 0.8s Time] [2021-12-06 21:00:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 21:00:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 21:00:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 21:00:08,644 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 285 [2021-12-06 21:00:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:08,644 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 21:00:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 6.375) internal successors, (357), 57 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 21:00:08,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-06 21:00:08,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-06 21:00:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-12-06 21:00:08,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 21:00:08,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 21:00:08,857 INFO L732 BasicCegarLoop]: Path program histogram: [33, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:08,861 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 21:00:08,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 09:00:08 BoogieIcfgContainer [2021-12-06 21:00:08,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 21:00:08,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 21:00:08,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 21:00:08,869 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 21:00:08,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:57:35" (3/4) ... [2021-12-06 21:00:08,878 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 21:00:08,895 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-06 21:00:08,895 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 21:00:08,895 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 21:00:08,896 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 21:00:08,923 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 21:00:08,923 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 21:00:08,924 INFO L158 Benchmark]: Toolchain (without parser) took 154361.39ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 65.4MB in the beginning and 61.2MB in the end (delta: 4.2MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,924 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:00:08,924 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.17ms. Allocated memory is still 102.8MB. Free memory was 65.2MB in the beginning and 73.0MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,924 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.08ms. Allocated memory is still 102.8MB. Free memory was 73.0MB in the beginning and 71.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,924 INFO L158 Benchmark]: Boogie Preprocessor took 18.94ms. Allocated memory is still 102.8MB. Free memory was 71.3MB in the beginning and 70.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:00:08,924 INFO L158 Benchmark]: RCFGBuilder took 270.07ms. Allocated memory is still 102.8MB. Free memory was 69.6MB in the beginning and 56.2MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,924 INFO L158 Benchmark]: TraceAbstraction took 153703.08ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 55.8MB in the beginning and 65.2MB in the end (delta: -9.4MB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,924 INFO L158 Benchmark]: Witness Printer took 54.55ms. Allocated memory is still 180.4MB. Free memory was 64.2MB in the beginning and 61.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.17ms. Allocated memory is still 102.8MB. Free memory was 65.2MB in the beginning and 73.0MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.08ms. Allocated memory is still 102.8MB. Free memory was 73.0MB in the beginning and 71.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.94ms. Allocated memory is still 102.8MB. Free memory was 71.3MB in the beginning and 70.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 270.07ms. Allocated memory is still 102.8MB. Free memory was 69.6MB in the beginning and 56.2MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 153703.08ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 55.8MB in the beginning and 65.2MB in the end (delta: -9.4MB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. * Witness Printer took 54.55ms. Allocated memory is still 180.4MB. Free memory was 64.2MB in the beginning and 61.2MB in the end (delta: 2.9MB). 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 - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 52 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 153.7s, OverallIterations: 68, TraceHistogramMax: 20, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.1s, AutomataDifference: 48.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37541 SdHoareTripleChecker+Valid, 23.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37541 mSDsluCounter, 97883 SdHoareTripleChecker+Invalid, 19.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5384 IncrementalHoareTripleChecker+Unchecked, 93250 mSDsCounter, 3701 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 92283 IncrementalHoareTripleChecker+Invalid, 101368 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3701 mSolverCounterUnsat, 4633 mSDtfsCounter, 92283 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16031 GetRequests, 12207 SyntacticMatches, 91 SemanticMatches, 3733 ConstructedPredicates, 2 IntricatePredicates, 20 DeprecatedPredicates, 82759 ImplicationChecksByTransitivity, 63.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1904occurred in iteration=67, InterpolantAutomatonStates: 1641, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 68 MinimizatonAttempts, 3551 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 82.6s InterpolantComputationTime, 13850 NumberOfCodeBlocks, 13768 NumberOfCodeBlocksAsserted, 333 NumberOfCheckSat, 20445 ConstructedInterpolants, 1770 QuantifiedInterpolants, 224166 SizeOfPredicates, 750 NumberOfNonLiveVariables, 25606 ConjunctsInSsa, 3184 ConjunctsInUnsatCore, 170 InterpolantComputations, 18 PerfectInterpolantSequences, 26455/102860 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 - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-06 21:00:08,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423b825c-1cda-453e-a2ea-c8520952c6f6/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 Writing output log to file Ultimate.log Result: TRUE