./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 8ce03462fe975a31ea60daf5f1377957a781bf3e81bf898be84185f681a4ed0e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:49:16,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:49:16,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:49:16,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:49:16,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:49:16,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:49:16,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:49:16,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:49:16,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:49:16,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:49:16,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:49:16,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:49:16,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:49:16,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:49:16,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:49:16,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:49:16,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:49:16,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:49:16,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:49:16,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:49:16,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:49:16,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:49:16,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:49:16,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:49:16,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:49:16,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:49:16,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:49:16,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:49:16,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:49:16,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:49:16,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:49:16,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:49:16,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:49:16,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:49:16,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:49:16,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:49:16,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:49:16,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:49:16,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:49:16,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:49:16,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:49:16,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:49:16,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:49:16,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:49:16,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:49:16,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:49:16,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:49:16,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:49:16,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:49:16,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:49:16,882 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:49:16,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:49:16,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:49:16,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:49:16,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:49:16,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:49:16,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:49:16,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:49:16,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:49:16,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:49:16,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:49:16,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:49:16,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:49:16,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:49:16,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:49:16,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:49:16,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:49:16,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:49:16,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:49:16,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:49:16,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:49:16,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:49:16,885 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:49:16,886 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:49:16,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:49:16,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:49:16,886 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ce03462fe975a31ea60daf5f1377957a781bf3e81bf898be84185f681a4ed0e [2021-12-14 13:49:17,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:49:17,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:49:17,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:49:17,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:49:17,039 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:49:17,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i [2021-12-14 13:49:17,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a278a0852/c8bb6bd5569d4a068c952b22f520edb3/FLAGb25ee6643 [2021-12-14 13:49:17,395 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:49:17,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i [2021-12-14 13:49:17,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a278a0852/c8bb6bd5569d4a068c952b22f520edb3/FLAGb25ee6643 [2021-12-14 13:49:17,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a278a0852/c8bb6bd5569d4a068c952b22f520edb3 [2021-12-14 13:49:17,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:49:17,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:49:17,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:49:17,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:49:17,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:49:17,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:17,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9821fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17, skipping insertion in model container [2021-12-14 13:49:17,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:17,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:49:17,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:49:17,945 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i[920,933] [2021-12-14 13:49:17,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:49:17,963 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:49:17,971 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i[920,933] [2021-12-14 13:49:17,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:49:17,981 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:49:17,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17 WrapperNode [2021-12-14 13:49:17,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:49:17,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:49:17,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:49:17,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:49:17,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:17,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,006 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2021-12-14 13:49:18,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:49:18,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:49:18,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:49:18,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:49:18,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:49:18,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:49:18,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:49:18,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:49:18,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (1/1) ... [2021-12-14 13:49:18,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:49:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:18,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 13:49:18,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 13:49:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:49:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:49:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 13:49:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 13:49:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:49:18,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:49:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 13:49:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:49:18,116 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:49:18,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:49:18,205 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:49:18,209 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:49:18,209 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 13:49:18,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:49:18 BoogieIcfgContainer [2021-12-14 13:49:18,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:49:18,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:49:18,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:49:18,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:49:18,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:49:17" (1/3) ... [2021-12-14 13:49:18,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3f65c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:49:18, skipping insertion in model container [2021-12-14 13:49:18,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:17" (2/3) ... [2021-12-14 13:49:18,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3f65c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:49:18, skipping insertion in model container [2021-12-14 13:49:18,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:49:18" (3/3) ... [2021-12-14 13:49:18,217 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2021-12-14 13:49:18,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:49:18,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:49:18,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:49:18,256 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 [2021-12-14 13:49:18,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:49:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 13:49:18,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:18,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:18,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1156778892, now seen corresponding path program 1 times [2021-12-14 13:49:18,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:18,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022906359] [2021-12-14 13:49:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:18,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:18,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022906359] [2021-12-14 13:49:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022906359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:49:18,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:49:18,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 13:49:18,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506229602] [2021-12-14 13:49:18,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:49:18,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:49:18,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:49:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:49:18,527 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:18,605 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-12-14 13:49:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:49:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 13:49:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:18,612 INFO L225 Difference]: With dead ends: 40 [2021-12-14 13:49:18,612 INFO L226 Difference]: Without dead ends: 19 [2021-12-14 13:49:18,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:49:18,616 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:18,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:49:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-14 13:49:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2021-12-14 13:49:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-14 13:49:18,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2021-12-14 13:49:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:18,644 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-14 13:49:18,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-14 13:49:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 13:49:18,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:18,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:18,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:49:18,645 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1156719310, now seen corresponding path program 1 times [2021-12-14 13:49:18,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015820434] [2021-12-14 13:49:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:18,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:18,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015820434] [2021-12-14 13:49:18,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015820434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:49:18,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:49:18,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:49:18,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416132820] [2021-12-14 13:49:18,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:49:18,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:49:18,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:49:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:49:18,679 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:18,742 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-12-14 13:49:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:49:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 13:49:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:18,744 INFO L225 Difference]: With dead ends: 36 [2021-12-14 13:49:18,744 INFO L226 Difference]: Without dead ends: 25 [2021-12-14 13:49:18,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:49:18,750 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:18,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:49:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-14 13:49:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2021-12-14 13:49:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-12-14 13:49:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-14 13:49:18,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-12-14 13:49:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:18,758 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-14 13:49:18,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-14 13:49:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 13:49:18,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:18,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:18,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 13:49:18,759 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 723292333, now seen corresponding path program 1 times [2021-12-14 13:49:18,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412864482] [2021-12-14 13:49:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:18,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:18,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412864482] [2021-12-14 13:49:18,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412864482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:18,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064312360] [2021-12-14 13:49:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:18,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:18,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:18,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:49:18,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:49:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 13:49:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:18,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:49:19,028 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 33 treesize of output 21 [2021-12-14 13:49:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:19,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:19,165 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 18 treesize of output 16 [2021-12-14 13:49:19,169 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 34 treesize of output 32 [2021-12-14 13:49:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:19,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064312360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:19,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:19,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2021-12-14 13:49:19,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713483124] [2021-12-14 13:49:19,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:19,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 13:49:19,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 13:49:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-14 13:49:19,216 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:19,336 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-12-14 13:49:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 13:49:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 13:49:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:19,338 INFO L225 Difference]: With dead ends: 50 [2021-12-14 13:49:19,338 INFO L226 Difference]: Without dead ends: 39 [2021-12-14 13:49:19,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-14 13:49:19,339 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:19,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 57 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:19,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-14 13:49:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 16. [2021-12-14 13:49:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-14 13:49:19,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2021-12-14 13:49:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:19,345 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-14 13:49:19,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-14 13:49:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 13:49:19,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:19,346 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:19,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:19,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:19,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1125888878, now seen corresponding path program 2 times [2021-12-14 13:49:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866438457] [2021-12-14 13:49:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:19,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:19,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:19,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866438457] [2021-12-14 13:49:19,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866438457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:19,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202013078] [2021-12-14 13:49:19,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:49:19,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:19,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:49:19,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:49:19,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:49:19,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 13:49:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:19,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-14 13:49:19,773 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 13:49:19,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:49:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:19,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-12-14 13:49:19,976 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 210 treesize of output 206 [2021-12-14 13:49:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:20,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202013078] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:20,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:20,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2021-12-14 13:49:20,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334915170] [2021-12-14 13:49:20,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:20,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 13:49:20,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 13:49:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-14 13:49:20,139 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-12-14 13:49:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:20,285 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-12-14 13:49:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 13:49:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 13:49:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:20,289 INFO L225 Difference]: With dead ends: 62 [2021-12-14 13:49:20,289 INFO L226 Difference]: Without dead ends: 51 [2021-12-14 13:49:20,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-12-14 13:49:20,290 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:20,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 99 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 94 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-12-14 13:49:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-14 13:49:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 17. [2021-12-14 13:49:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2021-12-14 13:49:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-14 13:49:20,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-12-14 13:49:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:20,293 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-14 13:49:20,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-12-14 13:49:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-14 13:49:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 13:49:20,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:20,294 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:20,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:20,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-14 13:49:20,504 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1679035725, now seen corresponding path program 3 times [2021-12-14 13:49:20,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:20,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236927399] [2021-12-14 13:49:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:20,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:20,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:20,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236927399] [2021-12-14 13:49:20,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236927399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661874427] [2021-12-14 13:49:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:49:20,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:20,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:20,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:49:20,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:49:20,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 13:49:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:20,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 13:49:20,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:20,656 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 19 treesize of output 15 [2021-12-14 13:49:20,675 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 13:49:20,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:49:20,698 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-12-14 13:49:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 36 [2021-12-14 13:49:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:20,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:21,646 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| Int) (v_ArrVal_52 Int)) (let ((.cse0 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~index~0#1_55_75|) |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75|))) (or (= (mod (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (mod |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| 4294967296) 4)) v_ArrVal_52) |c_ULTIMATE.start_main_~#array~0#1.offset|) 4294967296) 0) (<= 8589934591 .cse0) (< .cse0 4294977295) (<= 10000 |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75|) (< |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| 0)))) is different from false [2021-12-14 13:49:23,327 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 38 treesize of output 36 [2021-12-14 13:49:23,333 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 446 treesize of output 442 [2021-12-14 13:49:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-14 13:49:23,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661874427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:23,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:23,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 19 [2021-12-14 13:49:23,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944949539] [2021-12-14 13:49:23,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:23,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 13:49:23,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:23,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 13:49:23,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=236, Unknown=2, NotChecked=32, Total=342 [2021-12-14 13:49:23,529 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-12-14 13:49:24,337 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) |c_ULTIMATE.start_main_~#array~0#1.offset|) 0)) (.cse0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~index~0#1|) 4294967296))) (and (or (= (* 4 .cse0) 0) .cse1) (<= |c_ULTIMATE.start_main_~index~0#1| 2) (<= 2 |c_ULTIMATE.start_main_~index~0#1|) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| Int) (v_ArrVal_52 Int)) (let ((.cse2 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~index~0#1_55_75|) |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75|))) (or (= (mod (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (mod |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| 4294967296) 4)) v_ArrVal_52) |c_ULTIMATE.start_main_~#array~0#1.offset|) 4294967296) 0) (<= 8589934591 .cse2) (< .cse2 4294977295) (<= 10000 |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75|) (< |aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| 0)))) .cse1 (< .cse0 10000))) is different from false [2021-12-14 13:49:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:24,799 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-12-14 13:49:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 13:49:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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) Word has length 12 [2021-12-14 13:49:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:24,800 INFO L225 Difference]: With dead ends: 127 [2021-12-14 13:49:24,800 INFO L226 Difference]: Without dead ends: 116 [2021-12-14 13:49:24,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=234, Invalid=961, Unknown=3, NotChecked=134, Total=1332 [2021-12-14 13:49:24,801 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 309 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:24,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 165 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 185 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2021-12-14 13:49:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-14 13:49:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 22. [2021-12-14 13:49:24,807 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) [2021-12-14 13:49:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-14 13:49:24,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2021-12-14 13:49:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:24,809 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-14 13:49:24,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-12-14 13:49:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-14 13:49:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 13:49:24,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:24,811 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:24,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:25,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:25,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1025434093, now seen corresponding path program 4 times [2021-12-14 13:49:25,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48015259] [2021-12-14 13:49:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:25,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:25,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:25,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48015259] [2021-12-14 13:49:25,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48015259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:25,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218016705] [2021-12-14 13:49:25,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:49:25,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:25,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:25,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:49:25,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:49:25,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:49:25,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 13:49:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-14 13:49:25,255 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 13:49:25,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:49:25,275 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 13:49:25,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:49:25,298 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-14 13:49:25,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-14 13:49:25,316 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 13:49:25,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:49:25,343 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 33 treesize of output 21 [2021-12-14 13:49:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:25,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:25,779 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 62 treesize of output 60 [2021-12-14 13:49:25,784 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 7922 treesize of output 7906 [2021-12-14 13:49:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:28,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218016705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:28,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:28,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2021-12-14 13:49:28,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619654396] [2021-12-14 13:49:28,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:28,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 13:49:28,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 13:49:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-12-14 13:49:28,261 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-12-14 13:49:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:28,745 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-12-14 13:49:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 13:49:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 14 [2021-12-14 13:49:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:28,746 INFO L225 Difference]: With dead ends: 96 [2021-12-14 13:49:28,746 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 13:49:28,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=1138, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 13:49:28,748 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 318 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:28,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 258 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 287 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2021-12-14 13:49:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 13:49:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 22. [2021-12-14 13:49:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-14 13:49:28,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2021-12-14 13:49:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:28,756 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-14 13:49:28,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-12-14 13:49:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-14 13:49:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 13:49:28,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:28,761 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:28,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:28,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:28,972 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash -319885851, now seen corresponding path program 1 times [2021-12-14 13:49:28,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:28,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643628134] [2021-12-14 13:49:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:28,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:49:29,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643628134] [2021-12-14 13:49:29,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643628134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081010355] [2021-12-14 13:49:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:29,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:29,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:29,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:49:29,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:49:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-14 13:49:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:29,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 13:49:29,263 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-14 13:49:29,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 13:49:29,291 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-14 13:49:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-14 13:49:29,315 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-14 13:49:29,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 13:49:29,338 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-14 13:49:29,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 13:49:29,404 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 39 treesize of output 21 [2021-12-14 13:49:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:29,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:30,059 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 64 treesize of output 62 [2021-12-14 13:49:30,062 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 4402 treesize of output 4386 [2021-12-14 13:49:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:32,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081010355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:32,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:32,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 29 [2021-12-14 13:49:32,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630583101] [2021-12-14 13:49:32,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:32,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 13:49:32,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:32,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 13:49:32,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-12-14 13:49:32,585 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:33,037 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-14 13:49:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 13:49:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 13:49:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:33,040 INFO L225 Difference]: With dead ends: 58 [2021-12-14 13:49:33,040 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 13:49:33,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 13:49:33,042 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 134 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2021-12-14 13:49:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 13:49:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2021-12-14 13:49:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-14 13:49:33,057 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2021-12-14 13:49:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:33,058 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-14 13:49:33,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-14 13:49:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 13:49:33,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:33,058 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:33,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 13:49:33,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:33,271 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -605345549, now seen corresponding path program 2 times [2021-12-14 13:49:33,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:33,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908529745] [2021-12-14 13:49:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:33,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 13:49:33,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:33,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908529745] [2021-12-14 13:49:33,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908529745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:33,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567463293] [2021-12-14 13:49:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:49:33,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:33,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:49:33,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:49:33,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:49:33,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 13:49:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 13:49:33,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 13:49:33,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567463293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:33,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:33,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-14 13:49:33,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386303707] [2021-12-14 13:49:33,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:33,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 13:49:33,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:33,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 13:49:33,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-12-14 13:49:33,771 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:34,844 INFO L93 Difference]: Finished difference Result 192 states and 217 transitions. [2021-12-14 13:49:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 13:49:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-14 13:49:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:34,855 INFO L225 Difference]: With dead ends: 192 [2021-12-14 13:49:34,855 INFO L226 Difference]: Without dead ends: 173 [2021-12-14 13:49:34,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-12-14 13:49:34,856 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 404 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:34,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 413 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:49:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-14 13:49:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 38. [2021-12-14 13:49:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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) [2021-12-14 13:49:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-14 13:49:34,861 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 28 [2021-12-14 13:49:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-14 13:49:34,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-14 13:49:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 13:49:34,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:34,862 INFO L514 BasicCegarLoop]: trace histogram [16, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:34,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 13:49:35,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:35,071 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:35,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1528922904, now seen corresponding path program 3 times [2021-12-14 13:49:35,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:35,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868290405] [2021-12-14 13:49:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:35,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 13:49:35,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868290405] [2021-12-14 13:49:35,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868290405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071320410] [2021-12-14 13:49:35,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:49:35,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:35,323 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:49:35,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:49:46,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 13:49:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:46,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-14 13:49:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 13:49:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:46,942 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 [2021-12-14 13:49:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:46,982 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 29 treesize of output 28 [2021-12-14 13:49:47,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,013 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 29 treesize of output 28 [2021-12-14 13:49:47,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,041 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 29 treesize of output 28 [2021-12-14 13:49:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-14 13:49:47,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,127 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 [2021-12-14 13:49:47,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-14 13:49:47,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:49:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-12-14 13:49:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:49:47,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-12-14 13:49:47,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:49:47,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 70 [2021-12-14 13:49:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:49:47,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 88 [2021-12-14 13:49:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:49:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 88 [2021-12-14 13:49:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:49:47,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:49:47,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 106 [2021-12-14 13:49:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 13:49:47,603 INFO L328 TraceCheckSpWp]: Computing backward predicates...