./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/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_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc354f47e1cc26b26f82415b2113a1e937a24cebf9ecb225fe7f6242be1c8136 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:48:54,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:48:54,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:48:54,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:48:54,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:48:54,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:48:54,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:48:54,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:48:54,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:48:54,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:48:54,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:48:54,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:48:54,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:48:54,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:48:54,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:48:54,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:48:54,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:48:54,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:48:54,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:48:54,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:48:54,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:48:54,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:48:54,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:48:54,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:48:54,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:48:54,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:48:54,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:48:54,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:48:54,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:48:54,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:48:54,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:48:54,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:48:54,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:48:54,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:48:54,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:48:54,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:48:54,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:48:54,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:48:54,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:48:54,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:48:54,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:48:54,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:48:54,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:48:54,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:48:54,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:48:54,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:48:54,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:48:54,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:48:54,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:48:54,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:48:54,864 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:48:54,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:48:54,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:48:54,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:48:54,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:48:54,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:48:54,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:48:54,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:48:54,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:48:54,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:48:54,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:48:54,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:48:54,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:48:54,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:48:54,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:48:54,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:48:54,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:54,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:48:54,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:48:54,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:48:54,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:48:54,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:48:54,869 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:48:54,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:48:54,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:48:54,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:48:54,869 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_65cf4bf5-8cfc-4824-949b-3f5be94a2476/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc354f47e1cc26b26f82415b2113a1e937a24cebf9ecb225fe7f6242be1c8136 [2021-12-06 17:48:55,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:48:55,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:48:55,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:48:55,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:48:55,065 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:48:55,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/brs2.c [2021-12-06 17:48:55,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/data/a7c514968/5337defd956b40c79822840dc39f8ccc/FLAG153074e4d [2021-12-06 17:48:55,503 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:48:55,503 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/sv-benchmarks/c/array-fpi/brs2.c [2021-12-06 17:48:55,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/data/a7c514968/5337defd956b40c79822840dc39f8ccc/FLAG153074e4d [2021-12-06 17:48:55,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/data/a7c514968/5337defd956b40c79822840dc39f8ccc [2021-12-06 17:48:55,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:48:55,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:48:55,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:55,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:48:55,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:48:55,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ddaf05b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55, skipping insertion in model container [2021-12-06 17:48:55,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:48:55,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:48:55,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-12-06 17:48:55,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:55,678 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:48:55,688 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-12-06 17:48:55,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:55,704 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:48:55,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55 WrapperNode [2021-12-06 17:48:55,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:55,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:55,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:48:55,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:48:55,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,730 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-06 17:48:55,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:55,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:48:55,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:48:55,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:48:55,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:48:55,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:48:55,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:48:55,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:48:55,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (1/1) ... [2021-12-06 17:48:55,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:55,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:55,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:48:55,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:48:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:48:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:48:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:48:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:48:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:48:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:48:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:48:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:48:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:48:55,871 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:48:55,873 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:48:55,982 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:48:55,988 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:48:55,988 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:48:55,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:55 BoogieIcfgContainer [2021-12-06 17:48:55,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:48:55,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:48:55,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:48:55,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:48:55,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:48:55" (1/3) ... [2021-12-06 17:48:55,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4709ec64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:55, skipping insertion in model container [2021-12-06 17:48:55,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:55" (2/3) ... [2021-12-06 17:48:55,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4709ec64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:55, skipping insertion in model container [2021-12-06 17:48:55,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:55" (3/3) ... [2021-12-06 17:48:55,998 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2.c [2021-12-06 17:48:56,004 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:48:56,004 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:48:56,053 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:48:56,060 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 17:48:56,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:48:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:48:56,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:56,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:56,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-12-06 17:48:56,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:56,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899443397] [2021-12-06 17:48:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:56,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:56,215 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 17:48:56,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:56,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899443397] [2021-12-06 17:48:56,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899443397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:56,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:56,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:48:56,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705011314] [2021-12-06 17:48:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:56,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:48:56,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:48:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:56,247 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:56,258 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-06 17:48:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:48:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have 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 17:48:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:56,265 INFO L225 Difference]: With dead ends: 36 [2021-12-06 17:48:56,266 INFO L226 Difference]: Without dead ends: 16 [2021-12-06 17:48:56,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:56,271 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:56,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-06 17:48:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-06 17:48:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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 17:48:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-06 17:48:56,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-06 17:48:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:56,295 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-06 17:48:56,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-06 17:48:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:48:56,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:56,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:56,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:48:56,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-12-06 17:48:56,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735125715] [2021-12-06 17:48:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:56,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:56,356 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 17:48:56,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:56,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735125715] [2021-12-06 17:48:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735125715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:56,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:56,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:56,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023302582] [2021-12-06 17:48:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:56,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:48:56,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:48:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:48:56,359 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:56,400 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-06 17:48:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:48:56,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have 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 17:48:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:56,401 INFO L225 Difference]: With dead ends: 33 [2021-12-06 17:48:56,401 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 17:48:56,402 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 17:48:56,403 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:56,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:56,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 17:48:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-06 17:48:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 17:48:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-06 17:48:56,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-12-06 17:48:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:56,408 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-06 17:48:56,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-06 17:48:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:48:56,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:56,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:56,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:48:56,409 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-12-06 17:48:56,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201786395] [2021-12-06 17:48:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:56,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:48:56,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201786395] [2021-12-06 17:48:56,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201786395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:56,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:56,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:48:56,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195948744] [2021-12-06 17:48:56,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:56,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:56,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:56,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:56,489 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:56,523 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-06 17:48:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 17:48:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:56,524 INFO L225 Difference]: With dead ends: 27 [2021-12-06 17:48:56,524 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 17:48:56,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 17:48:56,525 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:56,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 17:48:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-06 17:48:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-06 17:48:56,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-06 17:48:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:56,536 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-06 17:48:56,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-06 17:48:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:48:56,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:56,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:56,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:48:56,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-12-06 17:48:56,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:56,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219537541] [2021-12-06 17:48:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:56,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:56,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219537541] [2021-12-06 17:48:56,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219537541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638564671] [2021-12-06 17:48:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:56,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:56,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:56,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:56,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:48:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:48:56,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:56,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:56,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638564671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:56,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:56,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 17:48:56,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762218573] [2021-12-06 17:48:56,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:56,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:48:56,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:48:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:48:56,799 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:56,875 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-06 17:48:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:48:56,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 17:48:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:56,876 INFO L225 Difference]: With dead ends: 43 [2021-12-06 17:48:56,876 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 17:48:56,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:48:56,877 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 17:48:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-06 17:48:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 17:48:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-06 17:48:56,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-12-06 17:48:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:56,881 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-06 17:48:56,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-06 17:48:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:48:56,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:56,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:56,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:57,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:57,083 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-12-06 17:48:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827651303] [2021-12-06 17:48:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:57,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:57,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:57,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827651303] [2021-12-06 17:48:57,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827651303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:57,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668642191] [2021-12-06 17:48:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:57,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:57,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:57,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:57,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:48:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:57,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 17:48:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:57,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:48:57,586 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 15 treesize of output 11 [2021-12-06 17:48:57,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 17:48:57,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:48:57,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 28 [2021-12-06 17:48:57,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2021-12-06 17:48:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:57,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:01,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_73 Int)) (or (< 0 v_ArrVal_73) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_73)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) v_ArrVal_73) (* 2 c_~N~0)))) is different from false [2021-12-06 17:49:01,929 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 222 treesize of output 210 [2021-12-06 17:49:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 17:49:02,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668642191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:02,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:02,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2021-12-06 17:49:02,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563285758] [2021-12-06 17:49:02,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:02,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:49:02,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:49:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=459, Unknown=3, NotChecked=44, Total=600 [2021-12-06 17:49:02,783 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:02,961 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-06 17:49:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:49:02,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 17:49:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:02,962 INFO L225 Difference]: With dead ends: 56 [2021-12-06 17:49:02,962 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 17:49:02,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=130, Invalid=573, Unknown=3, NotChecked=50, Total=756 [2021-12-06 17:49:02,963 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:02,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 60 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 167 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2021-12-06 17:49:02,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 17:49:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-12-06 17:49:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 17:49:02,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2021-12-06 17:49:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:02,968 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 17:49:02,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 17:49:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:49:02,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:02,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:03,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:49:03,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:03,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:03,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2021-12-06 17:49:03,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:03,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598668736] [2021-12-06 17:49:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:03,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:03,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:03,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598668736] [2021-12-06 17:49:03,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598668736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:03,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602426370] [2021-12-06 17:49:03,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:49:03,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:03,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:03,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:03,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:49:03,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:49:03,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:03,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:49:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:03,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602426370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:03,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:03,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 17:49:03,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299452661] [2021-12-06 17:49:03,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:03,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:49:03,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:49:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:49:03,383 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:03,458 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-12-06 17:49:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:49:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 17:49:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:03,459 INFO L225 Difference]: With dead ends: 68 [2021-12-06 17:49:03,459 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 17:49:03,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:49:03,461 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:03,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:49:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 17:49:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-12-06 17:49:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-06 17:49:03,467 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2021-12-06 17:49:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:03,468 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-06 17:49:03,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-06 17:49:03,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 17:49:03,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:03,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:03,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:49:03,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 17:49:03,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1507669223, now seen corresponding path program 3 times [2021-12-06 17:49:03,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:03,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241287748] [2021-12-06 17:49:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:03,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:04,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241287748] [2021-12-06 17:49:04,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241287748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820923237] [2021-12-06 17:49:04,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:49:04,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:04,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:04,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:49:04,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:49:04,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:49:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:04,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:49:04,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 17:49:04,333 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-06 17:49:04,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-06 17:49:04,485 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 17:49:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:49:04,569 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-12-06 17:49:04,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2021-12-06 17:49:04,766 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-12-06 17:49:04,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 68 [2021-12-06 17:49:10,457 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-12-06 17:49:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 21 [2021-12-06 17:49:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:10,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:55,106 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 17:49:55,106 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 756 treesize of output 731 [2021-12-06 17:50:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:06,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820923237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:06,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:06,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 47 [2021-12-06 17:50:06,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214061211] [2021-12-06 17:50:06,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:06,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 17:50:06,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 17:50:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1831, Unknown=21, NotChecked=0, Total=2162 [2021-12-06 17:50:06,947 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 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 17:50:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:34,812 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2021-12-06 17:50:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 17:50:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 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) Word has length 29 [2021-12-06 17:50:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:34,814 INFO L225 Difference]: With dead ends: 121 [2021-12-06 17:50:34,814 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 17:50:34,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 77.8s TimeCoverageRelationStatistics Valid=723, Invalid=4073, Unknown=34, NotChecked=0, Total=4830 [2021-12-06 17:50:34,816 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:34,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 107 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 289 Unchecked, 0.1s Time] [2021-12-06 17:50:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 17:50:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2021-12-06 17:50:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-12-06 17:50:34,825 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 29 [2021-12-06 17:50:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-12-06 17:50:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 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 17:50:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-12-06 17:50:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:50:34,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:34,827 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:34,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:50:35,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:35,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -904524816, now seen corresponding path program 4 times [2021-12-06 17:50:35,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:35,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79581796] [2021-12-06 17:50:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:35,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:35,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:35,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79581796] [2021-12-06 17:50:35,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79581796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:35,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003307288] [2021-12-06 17:50:35,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:50:35,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:35,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:35,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:35,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:50:35,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:50:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:50:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:35,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:35,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003307288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:35,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:35,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 17:50:35,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55767799] [2021-12-06 17:50:35,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:35,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:50:35,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:50:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:50:35,218 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:35,309 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2021-12-06 17:50:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:50:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 17:50:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:35,310 INFO L225 Difference]: With dead ends: 143 [2021-12-06 17:50:35,310 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 17:50:35,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:50:35,311 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:35,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 48 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:50:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 17:50:35,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2021-12-06 17:50:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-06 17:50:35,319 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 32 [2021-12-06 17:50:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:35,319 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-06 17:50:35,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:35,319 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-06 17:50:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:50:35,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:35,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:35,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:50:35,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:35,522 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:35,523 INFO L85 PathProgramCache]: Analyzing trace with hash 611591309, now seen corresponding path program 5 times [2021-12-06 17:50:35,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:35,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578383181] [2021-12-06 17:50:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:35,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:35,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578383181] [2021-12-06 17:50:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578383181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:35,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840300092] [2021-12-06 17:50:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:50:35,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:35,639 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:35,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:50:35,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 17:50:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:50:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:35,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:35,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840300092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:35,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:35,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 17:50:35,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042537483] [2021-12-06 17:50:35,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:35,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:50:35,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:50:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:50:35,810 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:35,945 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2021-12-06 17:50:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:50:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 17:50:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:35,946 INFO L225 Difference]: With dead ends: 92 [2021-12-06 17:50:35,946 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 17:50:35,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:50:35,947 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:35,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:50:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 17:50:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2021-12-06 17:50:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-06 17:50:35,953 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2021-12-06 17:50:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:35,953 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-06 17:50:35,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-06 17:50:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 17:50:35,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:35,955 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:35,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:50:36,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 17:50:36,156 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2033267204, now seen corresponding path program 6 times [2021-12-06 17:50:36,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:36,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727724115] [2021-12-06 17:50:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:36,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:36,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:36,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727724115] [2021-12-06 17:50:36,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727724115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:36,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545696158] [2021-12-06 17:50:36,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:50:36,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:36,737 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:36,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65cf4bf5-8cfc-4824-949b-3f5be94a2476/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:50:36,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 17:50:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 17:50:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:36,863 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 17:50:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-06 17:50:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:36,994 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-12-06 17:50:36,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 48 [2021-12-06 17:50:37,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,219 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-12-06 17:50:37,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 46 [2021-12-06 17:50:37,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:50:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,362 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-12-06 17:50:37,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 56 [2021-12-06 17:50:37,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:50:37,515 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-12-06 17:50:37,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 59 [2021-12-06 17:50:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:50:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 50 [2021-12-06 17:50:37,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:37,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2021-12-06 17:50:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:37,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:34,976 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-12-06 17:51:34,977 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 43402 treesize of output 42782