./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/array-tiling/pnr2.c -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 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:22:58,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:22:58,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:22:58,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:22:58,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:22:58,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:22:58,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:22:58,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:22:58,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:22:58,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:22:58,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:22:58,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:22:58,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:22:58,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:22:58,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:22:58,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:22:58,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:22:58,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:22:58,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:22:58,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:22:58,723 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:22:58,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:22:58,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:22:58,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:22:58,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:22:58,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:22:58,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:22:58,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:22:58,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:22:58,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:22:58,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:22:58,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:22:58,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:22:58,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:22:58,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:22:58,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:22:58,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:22:58,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:22:58,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:22:58,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:22:58,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:22:58,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:22:58,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:22:58,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:22:58,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:22:58,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:22:58,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:22:58,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:22:58,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:22:58,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:22:58,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:22:58,770 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:22:58,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:22:58,771 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:22:58,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:22:58,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:22:58,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:22:58,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:22:58,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:22:58,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:22:58,772 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:22:58,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:22:58,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:22:58,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:22:58,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:22:58,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:22:58,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:22:58,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:22:58,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:22:58,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:22:58,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:22:58,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:22:58,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:22:58,775 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:22:58,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:22:58,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:22:58,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2022-07-11 22:22:58,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:22:59,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:22:59,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:22:59,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:22:59,009 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:22:59,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2022-07-11 22:22:59,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553382d52/2e908a160b4b40d9abef1176124cce81/FLAGac5e245b3 [2022-07-11 22:22:59,370 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:22:59,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2022-07-11 22:22:59,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553382d52/2e908a160b4b40d9abef1176124cce81/FLAGac5e245b3 [2022-07-11 22:22:59,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553382d52/2e908a160b4b40d9abef1176124cce81 [2022-07-11 22:22:59,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:22:59,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:22:59,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:22:59,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:22:59,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:22:59,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:22:59" (1/1) ... [2022-07-11 22:22:59,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324bcd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:22:59, skipping insertion in model container [2022-07-11 22:22:59,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:22:59" (1/1) ... [2022-07-11 22:22:59,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:22:59,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:22:59,968 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/array-tiling/pnr2.c[395,408] [2022-07-11 22:22:59,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:23:00,001 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:23:00,012 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/array-tiling/pnr2.c[395,408] [2022-07-11 22:23:00,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:23:00,026 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:23:00,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00 WrapperNode [2022-07-11 22:23:00,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:23:00,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:23:00,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:23:00,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:23:00,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,068 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2022-07-11 22:23:00,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:23:00,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:23:00,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:23:00,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:23:00,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:23:00,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:23:00,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:23:00,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:23:00,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (1/1) ... [2022-07-11 22:23:00,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:23:00,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:00,139 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) [2022-07-11 22:23:00,148 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 [2022-07-11 22:23:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:23:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:23:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:23:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 22:23:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-11 22:23:00,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-11 22:23:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:23:00,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:23:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:23:00,227 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:23:00,228 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:23:00,373 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:23:00,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:23:00,378 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 22:23:00,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:23:00 BoogieIcfgContainer [2022-07-11 22:23:00,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:23:00,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:23:00,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:23:00,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:23:00,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:22:59" (1/3) ... [2022-07-11 22:23:00,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcf53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:23:00, skipping insertion in model container [2022-07-11 22:23:00,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:00" (2/3) ... [2022-07-11 22:23:00,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcf53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:23:00, skipping insertion in model container [2022-07-11 22:23:00,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:23:00" (3/3) ... [2022-07-11 22:23:00,385 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2022-07-11 22:23:00,393 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:23:00,393 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:23:00,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:23:00,429 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5199a3b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3961b08e [2022-07-11 22:23:00,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:23:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 22:23:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 22:23:00,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:00,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:00,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:00,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077575, now seen corresponding path program 1 times [2022-07-11 22:23:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:00,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778378227] [2022-07-11 22:23:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:00,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:23:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:00,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778378227] [2022-07-11 22:23:00,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778378227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:23:00,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:23:00,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 22:23:00,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755259388] [2022-07-11 22:23:00,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:23:00,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 22:23:00,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 22:23:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:23:00,743 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:23:00,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:00,799 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-07-11 22:23:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:23:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 22:23:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:00,805 INFO L225 Difference]: With dead ends: 66 [2022-07-11 22:23:00,805 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 22:23:00,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:23:00,809 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:00,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:23:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 22:23:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-07-11 22:23:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 22:23:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-11 22:23:00,835 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-07-11 22:23:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:00,835 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-11 22:23:00,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:23:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-11 22:23:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-11 22:23:00,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:00,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:00,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:23:00,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:00,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2094570770, now seen corresponding path program 1 times [2022-07-11 22:23:00,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:00,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789299307] [2022-07-11 22:23:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:00,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:00,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:00,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:00,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789299307] [2022-07-11 22:23:00,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789299307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145269405] [2022-07-11 22:23:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:00,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:00,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:00,991 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) [2022-07-11 22:23:00,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:23:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 22:23:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:01,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:01,143 INFO L390 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 22 treesize of output 21 [2022-07-11 22:23:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:01,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:01,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-11 22:23:01,257 INFO L390 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 24 treesize of output 22 [2022-07-11 22:23:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:01,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145269405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:01,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:01,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-11 22:23:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899718855] [2022-07-11 22:23:01,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:01,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:23:01,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:23:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:23:01,274 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 22:23:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:01,486 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-11 22:23:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:23:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-07-11 22:23:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:01,491 INFO L225 Difference]: With dead ends: 66 [2022-07-11 22:23:01,493 INFO L226 Difference]: Without dead ends: 64 [2022-07-11 22:23:01,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:23:01,496 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:01,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 192 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:23:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-11 22:23:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2022-07-11 22:23:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 22:23:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-07-11 22:23:01,510 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2022-07-11 22:23:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:01,510 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-07-11 22:23:01,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 22:23:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-07-11 22:23:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-11 22:23:01,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:01,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:01,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:01,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:01,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1613590512, now seen corresponding path program 1 times [2022-07-11 22:23:01,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:01,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977156957] [2022-07-11 22:23:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:01,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:01,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977156957] [2022-07-11 22:23:01,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977156957] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:01,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608962989] [2022-07-11 22:23:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:01,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:01,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:01,922 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) [2022-07-11 22:23:01,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:23:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 22:23:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:02,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:02,142 INFO L390 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 21 treesize of output 20 [2022-07-11 22:23:02,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:23:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:23:02,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:02,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-11 22:23:02,300 INFO L390 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 28 treesize of output 26 [2022-07-11 22:23:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:02,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608962989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:02,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:02,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-11 22:23:02,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514255369] [2022-07-11 22:23:02,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:02,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:23:02,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:23:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:23:02,362 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 22:23:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:02,787 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-07-11 22:23:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 22:23:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2022-07-11 22:23:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:02,789 INFO L225 Difference]: With dead ends: 116 [2022-07-11 22:23:02,789 INFO L226 Difference]: Without dead ends: 114 [2022-07-11 22:23:02,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 22:23:02,791 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:02,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 375 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 389 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-07-11 22:23:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-11 22:23:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 51. [2022-07-11 22:23:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-11 22:23:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-07-11 22:23:02,810 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 25 [2022-07-11 22:23:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:02,810 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-07-11 22:23:02,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 22:23:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-07-11 22:23:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 22:23:02,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:02,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:02,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:03,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-11 22:23:03,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 313438052, now seen corresponding path program 1 times [2022-07-11 22:23:03,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716280190] [2022-07-11 22:23:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:03,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:03,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:03,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716280190] [2022-07-11 22:23:03,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716280190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:03,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856908941] [2022-07-11 22:23:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:03,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:03,170 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) [2022-07-11 22:23:03,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:23:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 22:23:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:03,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:23:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:03,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:03,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:03,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:03,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856908941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:03,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:03,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-11 22:23:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372871176] [2022-07-11 22:23:03,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:03,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:23:03,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:23:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:23:03,344 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 22:23:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:03,491 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-07-11 22:23:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 22:23:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-11 22:23:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:03,492 INFO L225 Difference]: With dead ends: 108 [2022-07-11 22:23:03,493 INFO L226 Difference]: Without dead ends: 106 [2022-07-11 22:23:03,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:23:03,494 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:03,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 200 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:23:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-11 22:23:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2022-07-11 22:23:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-11 22:23:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2022-07-11 22:23:03,504 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 29 [2022-07-11 22:23:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:03,504 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2022-07-11 22:23:03,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 22:23:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2022-07-11 22:23:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 22:23:03,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:03,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:03,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-11 22:23:03,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:03,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1014502630, now seen corresponding path program 1 times [2022-07-11 22:23:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:03,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532483714] [2022-07-11 22:23:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:03,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:03,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532483714] [2022-07-11 22:23:03,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532483714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637595660] [2022-07-11 22:23:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:03,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:03,842 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) [2022-07-11 22:23:03,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:23:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 22:23:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:03,970 INFO L390 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 [2022-07-11 22:23:04,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:23:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:04,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:04,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:04,117 INFO L390 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 30 [2022-07-11 22:23:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:04,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637595660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:04,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:04,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-11 22:23:04,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786482501] [2022-07-11 22:23:04,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:23:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:23:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:23:04,166 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:23:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:04,645 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2022-07-11 22:23:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 22:23:04,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-07-11 22:23:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:04,646 INFO L225 Difference]: With dead ends: 152 [2022-07-11 22:23:04,646 INFO L226 Difference]: Without dead ends: 150 [2022-07-11 22:23:04,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 22:23:04,647 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 141 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:04,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:23:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-11 22:23:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 57. [2022-07-11 22:23:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-11 22:23:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-07-11 22:23:04,656 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2022-07-11 22:23:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:04,657 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-07-11 22:23:04,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:23:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-07-11 22:23:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-11 22:23:04,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:04,658 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:04,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:04,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:04,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:04,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1137782566, now seen corresponding path program 2 times [2022-07-11 22:23:04,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:04,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039097884] [2022-07-11 22:23:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:05,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:05,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:05,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:05,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039097884] [2022-07-11 22:23:05,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039097884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:05,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378644938] [2022-07-11 22:23:05,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:05,065 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) [2022-07-11 22:23:05,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:23:05,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:05,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:05,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 22:23:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:05,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:05,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378644938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:05,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:05,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-11 22:23:05,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859016624] [2022-07-11 22:23:05,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:05,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 22:23:05,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 22:23:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2022-07-11 22:23:05,462 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:23:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:05,677 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-07-11 22:23:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 22:23:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2022-07-11 22:23:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:05,679 INFO L225 Difference]: With dead ends: 104 [2022-07-11 22:23:05,679 INFO L226 Difference]: Without dead ends: 88 [2022-07-11 22:23:05,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2022-07-11 22:23:05,681 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 238 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:05,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 96 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:23:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-11 22:23:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2022-07-11 22:23:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 22:23:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-07-11 22:23:05,706 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 33 [2022-07-11 22:23:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:05,706 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-07-11 22:23:05,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:23:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-07-11 22:23:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 22:23:05,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:05,710 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:05,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-11 22:23:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:05,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2068313767, now seen corresponding path program 2 times [2022-07-11 22:23:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:05,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626371458] [2022-07-11 22:23:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:05,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:06,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:06,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:06,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626371458] [2022-07-11 22:23:06,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626371458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543265227] [2022-07-11 22:23:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:06,080 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) [2022-07-11 22:23:06,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:23:06,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:06,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-11 22:23:06,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:06,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:06,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:06,250 INFO L390 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 [2022-07-11 22:23:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:06,317 INFO L390 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 24 treesize of output 23 [2022-07-11 22:23:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:06,364 INFO L390 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 24 treesize of output 23 [2022-07-11 22:23:06,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:23:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:06,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:06,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543265227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:06,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:06,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-11 22:23:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637189476] [2022-07-11 22:23:06,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 22:23:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 22:23:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:23:06,525 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 22:23:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:07,029 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-11 22:23:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:23:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2022-07-11 22:23:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:07,031 INFO L225 Difference]: With dead ends: 99 [2022-07-11 22:23:07,031 INFO L226 Difference]: Without dead ends: 97 [2022-07-11 22:23:07,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-07-11 22:23:07,032 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:07,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 336 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 393 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-07-11 22:23:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-11 22:23:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-07-11 22:23:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 22:23:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-11 22:23:07,039 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 39 [2022-07-11 22:23:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:07,040 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-11 22:23:07,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 22:23:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-11 22:23:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:23:07,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:07,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:07,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:07,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:07,258 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash 513618191, now seen corresponding path program 3 times [2022-07-11 22:23:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:07,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267775941] [2022-07-11 22:23:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:07,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:07,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:07,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:07,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:07,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:07,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:07,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267775941] [2022-07-11 22:23:07,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267775941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:07,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415212242] [2022-07-11 22:23:07,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:23:07,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:07,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:07,440 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) [2022-07-11 22:23:07,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:23:07,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 22:23:07,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:07,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 22:23:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:07,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:07,602 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:07,603 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:07,660 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:07,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:07,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:07,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:07,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:07,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415212242] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:07,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:07,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-07-11 22:23:07,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503579707] [2022-07-11 22:23:07,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:07,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:23:07,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:23:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:23:07,749 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-11 22:23:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:08,017 INFO L93 Difference]: Finished difference Result 158 states and 213 transitions. [2022-07-11 22:23:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 22:23:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2022-07-11 22:23:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:08,018 INFO L225 Difference]: With dead ends: 158 [2022-07-11 22:23:08,018 INFO L226 Difference]: Without dead ends: 156 [2022-07-11 22:23:08,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:23:08,019 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:08,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 254 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:23:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-11 22:23:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 79. [2022-07-11 22:23:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-11 22:23:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-07-11 22:23:08,029 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 47 [2022-07-11 22:23:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:08,030 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-07-11 22:23:08,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-11 22:23:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-07-11 22:23:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:23:08,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:08,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:08,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:08,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:08,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash 936320017, now seen corresponding path program 1 times [2022-07-11 22:23:08,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:08,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171563151] [2022-07-11 22:23:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:08,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:08,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:08,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:08,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:08,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:08,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171563151] [2022-07-11 22:23:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171563151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674201789] [2022-07-11 22:23:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:08,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:08,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:23:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:08,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 22:23:08,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:08,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:08,554 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:23:08,555 INFO L390 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 [2022-07-11 22:23:08,650 INFO L390 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 19 treesize of output 7 [2022-07-11 22:23:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:08,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:10,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:10,808 INFO L390 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 30 [2022-07-11 22:23:10,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674201789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:10,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:10,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-11 22:23:10,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117753702] [2022-07-11 22:23:10,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:10,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:23:10,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:23:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=518, Unknown=1, NotChecked=0, Total=600 [2022-07-11 22:23:10,836 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-11 22:23:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:11,441 INFO L93 Difference]: Finished difference Result 214 states and 285 transitions. [2022-07-11 22:23:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-11 22:23:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2022-07-11 22:23:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:11,443 INFO L225 Difference]: With dead ends: 214 [2022-07-11 22:23:11,443 INFO L226 Difference]: Without dead ends: 212 [2022-07-11 22:23:11,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=333, Invalid=1922, Unknown=1, NotChecked=0, Total=2256 [2022-07-11 22:23:11,444 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 153 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:11,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 423 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 462 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-07-11 22:23:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-11 22:23:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 101. [2022-07-11 22:23:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-11 22:23:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2022-07-11 22:23:11,457 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 47 [2022-07-11 22:23:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:11,457 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2022-07-11 22:23:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-11 22:23:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2022-07-11 22:23:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 22:23:11,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:11,458 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:11,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:11,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-11 22:23:11,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1147045125, now seen corresponding path program 4 times [2022-07-11 22:23:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:11,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99409769] [2022-07-11 22:23:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:11,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:11,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:11,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:11,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99409769] [2022-07-11 22:23:11,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99409769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21971524] [2022-07-11 22:23:11,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:23:11,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:11,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:11,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:11,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:23:11,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:23:11,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:11,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-11 22:23:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:11,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:23:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:12,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:12,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:12,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:12,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21971524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:12,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:12,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-11 22:23:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484918960] [2022-07-11 22:23:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:12,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 22:23:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:12,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 22:23:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:23:12,160 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-11 22:23:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:12,810 INFO L93 Difference]: Finished difference Result 319 states and 448 transitions. [2022-07-11 22:23:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 22:23:12,812 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2022-07-11 22:23:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:12,814 INFO L225 Difference]: With dead ends: 319 [2022-07-11 22:23:12,814 INFO L226 Difference]: Without dead ends: 317 [2022-07-11 22:23:12,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-07-11 22:23:12,815 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 104 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:12,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 440 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 22:23:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-11 22:23:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 187. [2022-07-11 22:23:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 148 states have internal predecessors, (197), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-11 22:23:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 263 transitions. [2022-07-11 22:23:12,859 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 263 transitions. Word has length 51 [2022-07-11 22:23:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:12,859 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 263 transitions. [2022-07-11 22:23:12,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-11 22:23:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 263 transitions. [2022-07-11 22:23:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 22:23:12,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:12,862 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:12,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 22:23:13,063 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash -541898617, now seen corresponding path program 1 times [2022-07-11 22:23:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:13,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864312676] [2022-07-11 22:23:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:13,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:13,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:13,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:13,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864312676] [2022-07-11 22:23:13,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864312676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955813930] [2022-07-11 22:23:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:13,350 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:13,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:23:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:13,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 22:23:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:13,498 INFO L390 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 [2022-07-11 22:23:13,637 INFO L390 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 19 treesize of output 7 [2022-07-11 22:23:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:13,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:13,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:13,767 INFO L390 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 30 [2022-07-11 22:23:13,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955813930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:13,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:13,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-11 22:23:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118728240] [2022-07-11 22:23:13,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:23:13,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:13,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:23:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:23:13,801 INFO L87 Difference]: Start difference. First operand 187 states and 263 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-11 22:23:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:14,769 INFO L93 Difference]: Finished difference Result 325 states and 440 transitions. [2022-07-11 22:23:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 22:23:14,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2022-07-11 22:23:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:14,771 INFO L225 Difference]: With dead ends: 325 [2022-07-11 22:23:14,771 INFO L226 Difference]: Without dead ends: 323 [2022-07-11 22:23:14,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=2331, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 22:23:14,772 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 174 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:14,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 480 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:23:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-11 22:23:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 115. [2022-07-11 22:23:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 94 states have internal predecessors, (117), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-11 22:23:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2022-07-11 22:23:14,792 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 51 [2022-07-11 22:23:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:14,792 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2022-07-11 22:23:14,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-11 22:23:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2022-07-11 22:23:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 22:23:14,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:14,793 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:14,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:15,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-11 22:23:15,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1086909947, now seen corresponding path program 5 times [2022-07-11 22:23:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64069034] [2022-07-11 22:23:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:15,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:15,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:15,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:15,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:15,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:15,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:15,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64069034] [2022-07-11 22:23:15,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64069034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:15,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223865620] [2022-07-11 22:23:15,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:23:15,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:15,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:15,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:15,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:23:15,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 22:23:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:15,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 22:23:15,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:15,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:15,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223865620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:15,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:15,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-11 22:23:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635429041] [2022-07-11 22:23:15,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 22:23:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:15,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 22:23:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 22:23:15,844 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:16,103 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2022-07-11 22:23:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 22:23:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 55 [2022-07-11 22:23:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:16,107 INFO L225 Difference]: With dead ends: 179 [2022-07-11 22:23:16,107 INFO L226 Difference]: Without dead ends: 155 [2022-07-11 22:23:16,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2022-07-11 22:23:16,108 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:16,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 123 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:23:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-11 22:23:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2022-07-11 22:23:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 102 states have internal predecessors, (125), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-11 22:23:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2022-07-11 22:23:16,126 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 55 [2022-07-11 22:23:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:16,126 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2022-07-11 22:23:16,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2022-07-11 22:23:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 22:23:16,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:16,128 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:16,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-11 22:23:16,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 22:23:16,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1543341178, now seen corresponding path program 2 times [2022-07-11 22:23:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098633184] [2022-07-11 22:23:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:16,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:16,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:16,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:16,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:16,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:16,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098633184] [2022-07-11 22:23:16,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098633184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270760461] [2022-07-11 22:23:16,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:16,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:16,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:16,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:23:16,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:16,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-11 22:23:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:16,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:16,564 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:16,565 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:16,610 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:16,610 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:16,637 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:16,637 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:16,693 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:16,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:16,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:16,803 INFO L390 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 [2022-07-11 22:23:16,805 INFO L390 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 36 treesize of output 32 [2022-07-11 22:23:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:16,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270760461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:16,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:16,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-11 22:23:16,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181112084] [2022-07-11 22:23:16,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 22:23:16,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 22:23:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-11 22:23:16,832 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 22:23:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:17,081 INFO L93 Difference]: Finished difference Result 192 states and 250 transitions. [2022-07-11 22:23:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 22:23:17,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-07-11 22:23:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:17,082 INFO L225 Difference]: With dead ends: 192 [2022-07-11 22:23:17,082 INFO L226 Difference]: Without dead ends: 190 [2022-07-11 22:23:17,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-11 22:23:17,083 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:17,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 337 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 346 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-07-11 22:23:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-11 22:23:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2022-07-11 22:23:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 118 states have internal predecessors, (149), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-11 22:23:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-07-11 22:23:17,112 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 61 [2022-07-11 22:23:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:17,113 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-07-11 22:23:17,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 22:23:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-07-11 22:23:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 22:23:17,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:17,114 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:17,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:17,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 22:23:17,316 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:17,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1471762440, now seen corresponding path program 1 times [2022-07-11 22:23:17,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:17,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774004859] [2022-07-11 22:23:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:17,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:17,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774004859] [2022-07-11 22:23:17,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774004859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:17,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288769921] [2022-07-11 22:23:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:17,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:17,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:17,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:17,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:23:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:17,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-11 22:23:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:17,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:17,564 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:17,564 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:17,615 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:17,615 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:17,643 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:17,644 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:17,703 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:17,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:17,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:17,830 INFO L390 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 [2022-07-11 22:23:17,832 INFO L390 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 36 treesize of output 32 [2022-07-11 22:23:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:17,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288769921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:17,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:17,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-11 22:23:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973536690] [2022-07-11 22:23:17,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:17,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 22:23:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 22:23:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-11 22:23:17,861 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 22:23:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:18,140 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-07-11 22:23:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 22:23:18,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-07-11 22:23:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:18,142 INFO L225 Difference]: With dead ends: 213 [2022-07-11 22:23:18,142 INFO L226 Difference]: Without dead ends: 211 [2022-07-11 22:23:18,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-11 22:23:18,142 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:18,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 341 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 363 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-07-11 22:23:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-11 22:23:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 151. [2022-07-11 22:23:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 122 states have (on average 1.2704918032786885) internal successors, (155), 122 states have internal predecessors, (155), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-11 22:23:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-07-11 22:23:18,163 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 61 [2022-07-11 22:23:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:18,163 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-07-11 22:23:18,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 22:23:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-07-11 22:23:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 22:23:18,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:18,164 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:18,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:18,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 22:23:18,380 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1484918790, now seen corresponding path program 3 times [2022-07-11 22:23:18,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024128260] [2022-07-11 22:23:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:18,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:18,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024128260] [2022-07-11 22:23:18,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024128260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822513044] [2022-07-11 22:23:18,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:23:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:18,552 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:18,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 22:23:18,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 22:23:18,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:23:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:18,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:18,823 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:18,823 INFO L390 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 [2022-07-11 22:23:18,887 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:18,887 INFO L390 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 26 treesize of output 25 [2022-07-11 22:23:18,932 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:23:18,932 INFO L390 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 26 treesize of output 25 [2022-07-11 22:23:19,019 INFO L390 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 19 treesize of output 7 [2022-07-11 22:23:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:23:19,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822513044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:21,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:21,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-11 22:23:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721458598] [2022-07-11 22:23:21,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:21,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 22:23:21,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 22:23:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=597, Unknown=1, NotChecked=0, Total=702 [2022-07-11 22:23:21,165 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-11 22:23:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:21,754 INFO L93 Difference]: Finished difference Result 222 states and 290 transitions. [2022-07-11 22:23:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-11 22:23:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 61 [2022-07-11 22:23:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:21,760 INFO L225 Difference]: With dead ends: 222 [2022-07-11 22:23:21,769 INFO L226 Difference]: Without dead ends: 220 [2022-07-11 22:23:21,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=366, Invalid=2183, Unknown=1, NotChecked=0, Total=2550 [2022-07-11 22:23:21,777 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:21,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 502 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 649 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-11 22:23:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-11 22:23:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 101. [2022-07-11 22:23:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-11 22:23:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-07-11 22:23:21,808 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 61 [2022-07-11 22:23:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:21,808 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-07-11 22:23:21,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-11 22:23:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-07-11 22:23:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 22:23:21,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:21,810 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:21,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:22,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:22,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -227276688, now seen corresponding path program 6 times [2022-07-11 22:23:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:22,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046676204] [2022-07-11 22:23:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:22,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:22,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:22,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046676204] [2022-07-11 22:23:22,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046676204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:22,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204002104] [2022-07-11 22:23:22,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:23:22,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:22,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:22,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:22,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 22:23:22,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 22:23:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 22:23:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:22,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:22,318 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:22,318 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:22,424 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:22,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:22,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:22,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:22,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:22,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204002104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:22,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:22,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-11 22:23:22,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037482624] [2022-07-11 22:23:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:22,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 22:23:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:22,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 22:23:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-11 22:23:22,548 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-11 22:23:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:23,533 INFO L93 Difference]: Finished difference Result 552 states and 806 transitions. [2022-07-11 22:23:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-11 22:23:23,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 69 [2022-07-11 22:23:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:23,537 INFO L225 Difference]: With dead ends: 552 [2022-07-11 22:23:23,537 INFO L226 Difference]: Without dead ends: 550 [2022-07-11 22:23:23,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2022-07-11 22:23:23,538 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 131 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:23,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 514 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 22:23:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-11 22:23:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 163. [2022-07-11 22:23:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.3046875) internal successors, (167), 128 states have internal predecessors, (167), 29 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-11 22:23:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2022-07-11 22:23:23,581 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 69 [2022-07-11 22:23:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:23,582 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2022-07-11 22:23:23,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-11 22:23:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2022-07-11 22:23:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 22:23:23,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:23,585 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:23,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:23,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-11 22:23:23,795 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1158926706, now seen corresponding path program 4 times [2022-07-11 22:23:23,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:23,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448293847] [2022-07-11 22:23:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:23,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:23,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448293847] [2022-07-11 22:23:23,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448293847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857542167] [2022-07-11 22:23:23,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:23:23,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:23,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:23,947 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:23,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 22:23:24,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:23:24,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-11 22:23:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:24,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:24,220 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:23:24,220 INFO L390 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 [2022-07-11 22:23:24,369 INFO L390 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 19 treesize of output 7 [2022-07-11 22:23:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:23:24,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:26,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:26,530 INFO L390 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 30 [2022-07-11 22:23:26,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857542167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:26,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:26,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-11 22:23:26,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502383681] [2022-07-11 22:23:26,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:26,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:23:26,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:26,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:23:26,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2022-07-11 22:23:26,560 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-11 22:23:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:28,280 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2022-07-11 22:23:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-11 22:23:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 69 [2022-07-11 22:23:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:28,284 INFO L225 Difference]: With dead ends: 697 [2022-07-11 22:23:28,284 INFO L226 Difference]: Without dead ends: 695 [2022-07-11 22:23:28,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=867, Invalid=7874, Unknown=1, NotChecked=0, Total=8742 [2022-07-11 22:23:28,286 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 332 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:28,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 813 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1515 Invalid, 0 Unknown, 115 Unchecked, 0.7s Time] [2022-07-11 22:23:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-11 22:23:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 196. [2022-07-11 22:23:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 152 states have internal predecessors, (200), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-11 22:23:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2022-07-11 22:23:28,336 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 69 [2022-07-11 22:23:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:28,336 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2022-07-11 22:23:28,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-11 22:23:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2022-07-11 22:23:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-11 22:23:28,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:28,337 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:28,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:28,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-11 22:23:28,554 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:28,554 INFO L85 PathProgramCache]: Analyzing trace with hash 407421926, now seen corresponding path program 7 times [2022-07-11 22:23:28,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:28,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991911834] [2022-07-11 22:23:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:28,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991911834] [2022-07-11 22:23:28,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991911834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561954471] [2022-07-11 22:23:28,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:23:28,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:28,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:28,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:28,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 22:23:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:28,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 22:23:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:28,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:28,956 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:28,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:28,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:29,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:29,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:29,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561954471] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:29,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:29,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-11 22:23:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207383169] [2022-07-11 22:23:29,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:29,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:23:29,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:23:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:23:29,060 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:23:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:31,091 INFO L93 Difference]: Finished difference Result 1725 states and 2618 transitions. [2022-07-11 22:23:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-11 22:23:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-07-11 22:23:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:31,098 INFO L225 Difference]: With dead ends: 1725 [2022-07-11 22:23:31,098 INFO L226 Difference]: Without dead ends: 1723 [2022-07-11 22:23:31,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=786, Invalid=6354, Unknown=0, NotChecked=0, Total=7140 [2022-07-11 22:23:31,100 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 192 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:31,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1071 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 22:23:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-07-11 22:23:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 406. [2022-07-11 22:23:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 314 states have (on average 1.375796178343949) internal successors, (432), 314 states have internal predecessors, (432), 83 states have call successors, (83), 8 states have call predecessors, (83), 8 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-11 22:23:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 598 transitions. [2022-07-11 22:23:31,218 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 598 transitions. Word has length 73 [2022-07-11 22:23:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:31,218 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 598 transitions. [2022-07-11 22:23:31,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:23:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 598 transitions. [2022-07-11 22:23:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-11 22:23:31,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:31,221 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:31,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:31,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-11 22:23:31,436 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1964317336, now seen corresponding path program 2 times [2022-07-11 22:23:31,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:31,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910638673] [2022-07-11 22:23:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:31,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:31,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910638673] [2022-07-11 22:23:31,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910638673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:31,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931368299] [2022-07-11 22:23:31,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:31,593 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:31,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 22:23:31,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:31,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-11 22:23:31,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:31,818 INFO L390 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 [2022-07-11 22:23:32,028 INFO L390 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 19 treesize of output 7 [2022-07-11 22:23:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:32,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:32,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:32,201 INFO L390 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 30 [2022-07-11 22:23:32,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931368299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:32,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:32,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-07-11 22:23:32,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676008503] [2022-07-11 22:23:32,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:32,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-11 22:23:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-11 22:23:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-07-11 22:23:32,236 INFO L87 Difference]: Start difference. First operand 406 states and 598 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:34,684 INFO L93 Difference]: Finished difference Result 1238 states and 1848 transitions. [2022-07-11 22:23:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-11 22:23:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2022-07-11 22:23:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:34,688 INFO L225 Difference]: With dead ends: 1238 [2022-07-11 22:23:34,688 INFO L226 Difference]: Without dead ends: 1236 [2022-07-11 22:23:34,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2899 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1163, Invalid=8539, Unknown=0, NotChecked=0, Total=9702 [2022-07-11 22:23:34,691 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 268 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:34,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 812 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 22:23:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-07-11 22:23:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 218. [2022-07-11 22:23:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 174 states have (on average 1.2816091954022988) internal successors, (223), 174 states have internal predecessors, (223), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-11 22:23:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 293 transitions. [2022-07-11 22:23:34,778 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 293 transitions. Word has length 73 [2022-07-11 22:23:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:34,779 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 293 transitions. [2022-07-11 22:23:34,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 293 transitions. [2022-07-11 22:23:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-11 22:23:34,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:34,780 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:34,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:34,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:34,997 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:34,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2050567076, now seen corresponding path program 8 times [2022-07-11 22:23:34,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244023045] [2022-07-11 22:23:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:35,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:35,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:35,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:35,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:35,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:35,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:35,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244023045] [2022-07-11 22:23:35,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244023045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:35,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99640527] [2022-07-11 22:23:35,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:35,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:35,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:35,370 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:35,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-11 22:23:35,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:35,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:35,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 22:23:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:36,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:36,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99640527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:36,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:36,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-07-11 22:23:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116812829] [2022-07-11 22:23:36,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:36,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-11 22:23:36,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-11 22:23:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 22:23:36,205 INFO L87 Difference]: Start difference. First operand 218 states and 293 transitions. Second operand has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-11 22:23:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:36,591 INFO L93 Difference]: Finished difference Result 298 states and 400 transitions. [2022-07-11 22:23:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-11 22:23:36,592 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 77 [2022-07-11 22:23:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:36,593 INFO L225 Difference]: With dead ends: 298 [2022-07-11 22:23:36,593 INFO L226 Difference]: Without dead ends: 266 [2022-07-11 22:23:36,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 22:23:36,594 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 255 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:36,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 180 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:23:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-11 22:23:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2022-07-11 22:23:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.2634408602150538) internal successors, (235), 186 states have internal predecessors, (235), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-11 22:23:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 311 transitions. [2022-07-11 22:23:36,653 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 311 transitions. Word has length 77 [2022-07-11 22:23:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:36,654 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 311 transitions. [2022-07-11 22:23:36,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-11 22:23:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 311 transitions. [2022-07-11 22:23:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:23:36,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:36,655 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:36,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:36,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:36,871 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash -949126895, now seen corresponding path program 9 times [2022-07-11 22:23:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:36,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652430088] [2022-07-11 22:23:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:36,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:23:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:23:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:23:37,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:37,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652430088] [2022-07-11 22:23:37,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652430088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:37,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073141557] [2022-07-11 22:23:37,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:23:37,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:37,041 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:37,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-11 22:23:37,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 22:23:37,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-11 22:23:37,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:37,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:37,257 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:37,257 INFO L390 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 30 treesize of output 29 [2022-07-11 22:23:37,432 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:37,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:23:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:37,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:37,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:23:37,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073141557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:37,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:37,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2022-07-11 22:23:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344460844] [2022-07-11 22:23:37,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 22:23:37,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 22:23:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:23:37,594 INFO L87 Difference]: Start difference. First operand 233 states and 311 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-11 22:23:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:42,227 INFO L93 Difference]: Finished difference Result 3600 states and 5511 transitions. [2022-07-11 22:23:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-07-11 22:23:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 91 [2022-07-11 22:23:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:42,239 INFO L225 Difference]: With dead ends: 3600 [2022-07-11 22:23:42,239 INFO L226 Difference]: Without dead ends: 3598 [2022-07-11 22:23:42,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 184 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8611 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1914, Invalid=19548, Unknown=0, NotChecked=0, Total=21462 [2022-07-11 22:23:42,242 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 191 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 4570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 3987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:42,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1516 Invalid, 4570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 22:23:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-11 22:23:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 458. [2022-07-11 22:23:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 360 states have (on average 1.3472222222222223) internal successors, (485), 360 states have internal predecessors, (485), 89 states have call successors, (89), 8 states have call predecessors, (89), 8 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-11 22:23:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 663 transitions. [2022-07-11 22:23:42,430 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 663 transitions. Word has length 91 [2022-07-11 22:23:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:42,430 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 663 transitions. [2022-07-11 22:23:42,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-11 22:23:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 663 transitions. [2022-07-11 22:23:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:23:42,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:42,432 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:42,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-11 22:23:42,650 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash -289595373, now seen corresponding path program 5 times [2022-07-11 22:23:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:42,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263317876] [2022-07-11 22:23:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:42,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:23:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:23:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:23:42,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263317876] [2022-07-11 22:23:42,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263317876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169736248] [2022-07-11 22:23:42,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:23:42,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:42,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:42,854 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:42,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-11 22:23:42,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-11 22:23:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-11 22:23:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:43,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:43,199 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:23:43,200 INFO L390 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 [2022-07-11 22:23:43,435 INFO L390 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 19 treesize of output 7 [2022-07-11 22:23:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-11 22:23:43,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:43,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:43,658 INFO L390 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 30 [2022-07-11 22:23:43,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169736248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:43,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:43,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-11 22:23:43,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695459289] [2022-07-11 22:23:43,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:43,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 22:23:43,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:43,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 22:23:43,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2022-07-11 22:23:43,695 INFO L87 Difference]: Start difference. First operand 458 states and 663 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-11 22:23:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:48,506 INFO L93 Difference]: Finished difference Result 1812 states and 2691 transitions. [2022-07-11 22:23:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-11 22:23:48,508 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) Word has length 91 [2022-07-11 22:23:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:48,513 INFO L225 Difference]: With dead ends: 1812 [2022-07-11 22:23:48,513 INFO L226 Difference]: Without dead ends: 1810 [2022-07-11 22:23:48,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1117, Invalid=13402, Unknown=1, NotChecked=0, Total=14520 [2022-07-11 22:23:48,515 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 390 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:48,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1259 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 2228 Invalid, 0 Unknown, 164 Unchecked, 1.0s Time] [2022-07-11 22:23:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-07-11 22:23:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 443. [2022-07-11 22:23:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 348 states have (on average 1.3333333333333333) internal successors, (464), 348 states have internal predecessors, (464), 83 states have call successors, (83), 11 states have call predecessors, (83), 11 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-11 22:23:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 630 transitions. [2022-07-11 22:23:48,659 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 630 transitions. Word has length 91 [2022-07-11 22:23:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:48,660 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 630 transitions. [2022-07-11 22:23:48,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-11 22:23:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 630 transitions. [2022-07-11 22:23:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 22:23:48,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:48,661 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:48,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-11 22:23:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-11 22:23:48,878 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash -68748281, now seen corresponding path program 10 times [2022-07-11 22:23:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:48,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805921082] [2022-07-11 22:23:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:48,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:23:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:23:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:23:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:23:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:23:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:23:49,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:49,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805921082] [2022-07-11 22:23:49,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805921082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:49,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467200414] [2022-07-11 22:23:49,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:23:49,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:49,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:49,076 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:49,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-11 22:23:49,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:23:49,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 22:23:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:49,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:49,398 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:49,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:23:49,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:49,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:49,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:23:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467200414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:49,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:49,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2022-07-11 22:23:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807442820] [2022-07-11 22:23:49,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:49,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:23:49,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:49,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:23:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:23:49,553 INFO L87 Difference]: Start difference. First operand 443 states and 630 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-11 22:24:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:00,754 INFO L93 Difference]: Finished difference Result 12950 states and 20137 transitions. [2022-07-11 22:24:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-07-11 22:24:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 95 [2022-07-11 22:24:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:00,802 INFO L225 Difference]: With dead ends: 12950 [2022-07-11 22:24:00,802 INFO L226 Difference]: Without dead ends: 12948 [2022-07-11 22:24:00,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32066 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5151, Invalid=66941, Unknown=0, NotChecked=0, Total=72092 [2022-07-11 22:24:00,810 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 427 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 7857 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 9250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 7857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:00,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 2732 Invalid, 9250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 7857 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-11 22:24:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2022-07-11 22:24:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 1173. [2022-07-11 22:24:01,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 904 states have (on average 1.4092920353982301) internal successors, (1274), 904 states have internal predecessors, (1274), 257 states have call successors, (257), 11 states have call predecessors, (257), 11 states have return successors, (257), 257 states have call predecessors, (257), 257 states have call successors, (257) [2022-07-11 22:24:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1788 transitions. [2022-07-11 22:24:01,422 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1788 transitions. Word has length 95 [2022-07-11 22:24:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:01,422 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1788 transitions. [2022-07-11 22:24:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-11 22:24:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1788 transitions. [2022-07-11 22:24:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 22:24:01,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:01,425 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:01,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-11 22:24:01,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:01,639 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:01,639 INFO L85 PathProgramCache]: Analyzing trace with hash -912753783, now seen corresponding path program 3 times [2022-07-11 22:24:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:01,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481350398] [2022-07-11 22:24:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:01,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:24:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:24:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:24:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:24:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:24:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:24:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:24:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:24:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:24:01,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:01,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481350398] [2022-07-11 22:24:01,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481350398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:01,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505262717] [2022-07-11 22:24:01,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:24:01,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:01,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:01,823 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:24:01,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-11 22:24:02,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 22:24:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:24:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-11 22:24:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:02,214 INFO L390 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 [2022-07-11 22:24:02,470 INFO L390 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 19 treesize of output 7 [2022-07-11 22:24:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:24:02,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:02,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:24:02,649 INFO L390 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 30 [2022-07-11 22:24:02,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505262717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:02,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:24:02,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2022-07-11 22:24:02,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455969014] [2022-07-11 22:24:02,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:02,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-11 22:24:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-11 22:24:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 22:24:02,678 INFO L87 Difference]: Start difference. First operand 1173 states and 1788 transitions. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-11 22:24:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:08,188 INFO L93 Difference]: Finished difference Result 4311 states and 6644 transitions. [2022-07-11 22:24:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-11 22:24:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 95 [2022-07-11 22:24:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:08,198 INFO L225 Difference]: With dead ends: 4311 [2022-07-11 22:24:08,199 INFO L226 Difference]: Without dead ends: 4309 [2022-07-11 22:24:08,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1973, Invalid=17767, Unknown=0, NotChecked=0, Total=19740 [2022-07-11 22:24:08,202 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 378 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:08,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1380 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 22:24:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2022-07-11 22:24:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 473. [2022-07-11 22:24:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 378 states have (on average 1.3095238095238095) internal successors, (495), 378 states have internal predecessors, (495), 83 states have call successors, (83), 11 states have call predecessors, (83), 11 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-11 22:24:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 661 transitions. [2022-07-11 22:24:08,527 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 661 transitions. Word has length 95 [2022-07-11 22:24:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:08,528 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 661 transitions. [2022-07-11 22:24:08,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-11 22:24:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 661 transitions. [2022-07-11 22:24:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-11 22:24:08,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:08,530 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:08,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-11 22:24:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:08,743 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:08,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1499687394, now seen corresponding path program 6 times [2022-07-11 22:24:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:08,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79636198] [2022-07-11 22:24:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:24:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:24:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:24:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:24:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:24:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:24:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:24:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:24:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:24:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-11 22:24:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:24:08,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79636198] [2022-07-11 22:24:08,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79636198] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249637469] [2022-07-11 22:24:08,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:24:08,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:08,981 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:24:09,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-11 22:24:09,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-11 22:24:09,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:24:09,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-11 22:24:09,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:09,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:24:09,432 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:24:09,432 INFO L390 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 [2022-07-11 22:24:09,509 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:24:09,509 INFO L390 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 26 treesize of output 25 [2022-07-11 22:24:09,576 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:24:09,576 INFO L390 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 26 treesize of output 25 [2022-07-11 22:24:09,659 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:24:09,659 INFO L390 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 26 treesize of output 25 [2022-07-11 22:24:09,703 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:24:09,704 INFO L390 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 26 treesize of output 25 [2022-07-11 22:24:09,868 INFO L390 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 19 treesize of output 7 [2022-07-11 22:24:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-11 22:24:09,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:10,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249637469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:10,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:24:10,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-11 22:24:10,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846500533] [2022-07-11 22:24:10,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:10,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-11 22:24:10,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:10,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-11 22:24:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1191, Unknown=1, NotChecked=0, Total=1332 [2022-07-11 22:24:10,574 INFO L87 Difference]: Start difference. First operand 473 states and 661 transitions. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-11 22:24:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:12,574 INFO L93 Difference]: Finished difference Result 853 states and 1173 transitions. [2022-07-11 22:24:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-11 22:24:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) Word has length 97 [2022-07-11 22:24:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:12,581 INFO L225 Difference]: With dead ends: 853 [2022-07-11 22:24:12,581 INFO L226 Difference]: Without dead ends: 851 [2022-07-11 22:24:12,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 134 SyntacticMatches, 12 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=694, Invalid=6787, Unknown=1, NotChecked=0, Total=7482 [2022-07-11 22:24:12,583 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 231 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:12,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 820 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1325 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2022-07-11 22:24:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-07-11 22:24:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 319. [2022-07-11 22:24:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 252 states have (on average 1.2817460317460319) internal successors, (323), 252 states have internal predecessors, (323), 53 states have call successors, (53), 13 states have call predecessors, (53), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-07-11 22:24:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 429 transitions. [2022-07-11 22:24:12,815 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 429 transitions. Word has length 97 [2022-07-11 22:24:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:12,816 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 429 transitions. [2022-07-11 22:24:12,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-11 22:24:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 429 transitions. [2022-07-11 22:24:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-11 22:24:12,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:12,817 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:12,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-11 22:24:13,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-11 22:24:13,033 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:13,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:13,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2124803075, now seen corresponding path program 11 times [2022-07-11 22:24:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:13,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506230190] [2022-07-11 22:24:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:13,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:24:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:24:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:24:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:24:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:24:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:24:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:24:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:24:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 99 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:24:13,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506230190] [2022-07-11 22:24:13,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506230190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616560734] [2022-07-11 22:24:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:24:13,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:13,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:13,419 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:24:13,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-11 22:24:13,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-11 22:24:13,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:24:13,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 22:24:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:24:14,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:24:14,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616560734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:24:14,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:24:14,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-07-11 22:24:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172030206] [2022-07-11 22:24:14,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:14,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 22:24:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 22:24:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 22:24:14,506 INFO L87 Difference]: Start difference. First operand 319 states and 429 transitions. Second operand has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-11 22:24:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:15,144 INFO L93 Difference]: Finished difference Result 423 states and 569 transitions. [2022-07-11 22:24:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 22:24:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 99 [2022-07-11 22:24:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:15,146 INFO L225 Difference]: With dead ends: 423 [2022-07-11 22:24:15,146 INFO L226 Difference]: Without dead ends: 383 [2022-07-11 22:24:15,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-07-11 22:24:15,147 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 443 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:15,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 229 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:24:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-11 22:24:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 339. [2022-07-11 22:24:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.2649253731343284) internal successors, (339), 268 states have internal predecessors, (339), 57 states have call successors, (57), 13 states have call predecessors, (57), 13 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-07-11 22:24:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 453 transitions. [2022-07-11 22:24:15,416 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 453 transitions. Word has length 99 [2022-07-11 22:24:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:15,417 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 453 transitions. [2022-07-11 22:24:15,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-11 22:24:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 453 transitions. [2022-07-11 22:24:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 22:24:15,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:15,434 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:15,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-11 22:24:15,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-11 22:24:15,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:15,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1648422158, now seen corresponding path program 12 times [2022-07-11 22:24:15,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:15,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585819890] [2022-07-11 22:24:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:24:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:24:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:24:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:24:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:24:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:24:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:24:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:24:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:24:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-11 22:24:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:24:15,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:15,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585819890] [2022-07-11 22:24:15,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585819890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115962829] [2022-07-11 22:24:15,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:24:15,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:15,842 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:24:15,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-11 22:24:16,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-11 22:24:16,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:24:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-11 22:24:16,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:16,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:24:16,261 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:24:16,261 INFO L390 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 30 treesize of output 29 [2022-07-11 22:24:16,514 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:24:16,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:24:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:24:16,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:16,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:24:16,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:24:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:24:16,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115962829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:24:16,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:24:16,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 28 [2022-07-11 22:24:16,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106064910] [2022-07-11 22:24:16,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:16,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-11 22:24:16,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-11 22:24:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-07-11 22:24:16,680 INFO L87 Difference]: Start difference. First operand 339 states and 453 transitions. Second operand has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-11 22:24:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:50,957 INFO L93 Difference]: Finished difference Result 16750 states and 25950 transitions. [2022-07-11 22:24:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2022-07-11 22:24:50,958 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 113 [2022-07-11 22:24:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:50,987 INFO L225 Difference]: With dead ends: 16750 [2022-07-11 22:24:50,987 INFO L226 Difference]: Without dead ends: 16748 [2022-07-11 22:24:51,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112803 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=14055, Invalid=225555, Unknown=0, NotChecked=0, Total=239610 [2022-07-11 22:24:51,000 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 637 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 13568 mSolverCounterSat, 2664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 16232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2664 IncrementalHoareTripleChecker+Valid, 13568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:51,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 3853 Invalid, 16232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2664 Valid, 13568 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-11 22:24:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16748 states. [2022-07-11 22:24:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16748 to 735. [2022-07-11 22:24:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 572 states have (on average 1.3636363636363635) internal successors, (780), 572 states have internal predecessors, (780), 149 states have call successors, (149), 13 states have call predecessors, (149), 13 states have return successors, (149), 149 states have call predecessors, (149), 149 states have call successors, (149) [2022-07-11 22:24:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1078 transitions. [2022-07-11 22:24:52,116 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1078 transitions. Word has length 113 [2022-07-11 22:24:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:52,116 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1078 transitions. [2022-07-11 22:24:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-11 22:24:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1078 transitions. [2022-07-11 22:24:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 22:24:52,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:52,118 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:52,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-11 22:24:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-11 22:24:52,334 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -754935820, now seen corresponding path program 7 times [2022-07-11 22:24:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:52,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95385160] [2022-07-11 22:24:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:24:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:24:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:24:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:24:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:24:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:24:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:24:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:24:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:24:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-11 22:24:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:24:52,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:52,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95385160] [2022-07-11 22:24:52,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95385160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:52,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289887112] [2022-07-11 22:24:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:24:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:52,680 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:24:52,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-11 22:24:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 22:24:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:52,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:24:53,060 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:24:53,060 INFO L390 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 [2022-07-11 22:24:53,378 INFO L390 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 19 treesize of output 7 [2022-07-11 22:24:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 27 proven. 213 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:24:53,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:55,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:24:55,681 INFO L390 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 30 [2022-07-11 22:24:55,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289887112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:55,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:24:55,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-07-11 22:24:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572753998] [2022-07-11 22:24:55,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-11 22:24:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-11 22:24:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2162, Unknown=1, NotChecked=0, Total=2352 [2022-07-11 22:24:55,717 INFO L87 Difference]: Start difference. First operand 735 states and 1078 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-11 22:25:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:01,648 INFO L93 Difference]: Finished difference Result 1648 states and 2405 transitions. [2022-07-11 22:25:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-11 22:25:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 113 [2022-07-11 22:25:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:01,651 INFO L225 Difference]: With dead ends: 1648 [2022-07-11 22:25:01,651 INFO L226 Difference]: Without dead ends: 1646 [2022-07-11 22:25:01,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5553 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1026, Invalid=14472, Unknown=2, NotChecked=0, Total=15500 [2022-07-11 22:25:01,653 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 323 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:01,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1492 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 2441 Invalid, 0 Unknown, 163 Unchecked, 0.9s Time] [2022-07-11 22:25:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-11 22:25:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 531. [2022-07-11 22:25:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 412 states have (on average 1.3009708737864079) internal successors, (536), 420 states have internal predecessors, (536), 101 states have call successors, (101), 17 states have call predecessors, (101), 17 states have return successors, (101), 93 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-11 22:25:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 738 transitions. [2022-07-11 22:25:02,216 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 738 transitions. Word has length 113 [2022-07-11 22:25:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:02,216 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 738 transitions. [2022-07-11 22:25:02,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-11 22:25:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 738 transitions. [2022-07-11 22:25:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-11 22:25:02,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:02,218 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:02,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:02,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-11 22:25:02,435 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1171866264, now seen corresponding path program 13 times [2022-07-11 22:25:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953531331] [2022-07-11 22:25:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:25:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:25:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:25:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:25:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:25:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:25:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:25:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-11 22:25:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:25:02,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:02,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953531331] [2022-07-11 22:25:02,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953531331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:02,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237191738] [2022-07-11 22:25:02,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:25:02,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:02,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:02,651 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:25:02,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-11 22:25:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:02,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-11 22:25:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:02,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:03,170 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:25:03,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:25:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:25:03,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:03,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:25:03,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:25:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:25:03,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237191738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:03,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:03,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-07-11 22:25:03,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33368237] [2022-07-11 22:25:03,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:03,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-11 22:25:03,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-11 22:25:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-07-11 22:25:03,353 INFO L87 Difference]: Start difference. First operand 531 states and 738 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-11 22:27:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:27:09,949 INFO L93 Difference]: Finished difference Result 60525 states and 94471 transitions. [2022-07-11 22:27:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 924 states. [2022-07-11 22:27:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 117 [2022-07-11 22:27:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:27:10,089 INFO L225 Difference]: With dead ends: 60525 [2022-07-11 22:27:10,089 INFO L226 Difference]: Without dead ends: 60523 [2022-07-11 22:27:10,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 237 SyntacticMatches, 7 SemanticMatches, 930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424502 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=39010, Invalid=828682, Unknown=0, NotChecked=0, Total=867692 [2022-07-11 22:27:10,143 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 1145 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 28946 mSolverCounterSat, 5780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 7203 SdHoareTripleChecker+Invalid, 34726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5780 IncrementalHoareTripleChecker+Valid, 28946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:27:10,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 7203 Invalid, 34726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5780 Valid, 28946 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-07-11 22:27:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60523 states. [2022-07-11 22:27:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60523 to 1699. [2022-07-11 22:27:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1304 states have (on average 1.4125766871165644) internal successors, (1842), 1304 states have internal predecessors, (1842), 377 states have call successors, (377), 17 states have call predecessors, (377), 17 states have return successors, (377), 377 states have call predecessors, (377), 377 states have call successors, (377) [2022-07-11 22:27:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2596 transitions. [2022-07-11 22:27:14,268 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2596 transitions. Word has length 117 [2022-07-11 22:27:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:27:14,269 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2596 transitions. [2022-07-11 22:27:14,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-11 22:27:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2596 transitions. [2022-07-11 22:27:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-11 22:27:14,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:27:14,272 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:27:14,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-11 22:27:14,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-11 22:27:14,488 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:27:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:27:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2069259542, now seen corresponding path program 4 times [2022-07-11 22:27:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:27:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205462932] [2022-07-11 22:27:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:27:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:27:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:27:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:27:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:27:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:27:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:27:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:27:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 22:27:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:27:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-11 22:27:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:27:14,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:27:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205462932] [2022-07-11 22:27:14,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205462932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:27:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157994419] [2022-07-11 22:27:14,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:27:14,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:27:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:27:14,740 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:27:14,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-11 22:27:14,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:27:14,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:27:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 22:27:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:27:15,093 INFO L390 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 [2022-07-11 22:27:15,475 INFO L390 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 19 treesize of output 7 [2022-07-11 22:27:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:27:15,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:27:15,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:27:15,728 INFO L390 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 30 [2022-07-11 22:27:15,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157994419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:27:15,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:27:15,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-07-11 22:27:15,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862095700] [2022-07-11 22:27:15,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:27:15,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-11 22:27:15,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-11 22:27:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 22:27:15,757 INFO L87 Difference]: Start difference. First operand 1699 states and 2596 transitions. Second operand has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-11 22:27:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:27:31,638 INFO L93 Difference]: Finished difference Result 6811 states and 10477 transitions. [2022-07-11 22:27:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-07-11 22:27:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 117 [2022-07-11 22:27:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:27:31,648 INFO L225 Difference]: With dead ends: 6811 [2022-07-11 22:27:31,648 INFO L226 Difference]: Without dead ends: 6809 [2022-07-11 22:27:31,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12161 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3044, Invalid=32488, Unknown=0, NotChecked=0, Total=35532 [2022-07-11 22:27:31,650 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 494 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 3891 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 4796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 3891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:27:31,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1821 Invalid, 4796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 3891 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 22:27:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6809 states.