./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-examples/standard_sentinel.i.v+cfa-reducer.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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:25:21,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:25:21,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:25:21,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:25:21,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:25:21,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:25:21,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:25:21,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:25:21,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:25:21,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:25:21,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:25:21,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:25:21,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:25:21,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:25:21,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:25:21,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:25:21,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:25:21,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:25:21,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:25:21,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:25:21,782 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:25:21,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:25:21,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:25:21,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:25:21,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:25:21,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:25:21,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:25:21,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:25:21,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:25:21,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:25:21,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:25:21,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:25:21,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:25:21,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:25:21,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:25:21,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:25:21,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:25:21,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:25:21,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:25:21,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:25:21,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:25:21,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:25:21,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:25:21,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:25:21,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:25:21,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:25:21,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:25:21,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:25:21,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:25:21,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:25:21,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:25:21,839 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:25:21,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:25:21,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:25:21,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:25:21,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:25:21,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:25:21,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:25:21,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:25:21,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:25:21,841 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:25:21,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:25:21,842 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:25:21,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:25:21,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:25:21,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:25:21,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:25:21,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:25:21,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:25:21,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:25:21,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:25:21,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:25:21,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:25:21,857 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:25:21,857 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:25:21,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:25:21,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2022-07-22 09:25:22,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:25:22,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:25:22,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:25:22,130 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:25:22,130 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:25:22,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-07-22 09:25:22,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510bbbd82/51414f2d69564ca3bdb9746281f31603/FLAG03a3185d3 [2022-07-22 09:25:22,568 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:25:22,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-07-22 09:25:22,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510bbbd82/51414f2d69564ca3bdb9746281f31603/FLAG03a3185d3 [2022-07-22 09:25:22,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510bbbd82/51414f2d69564ca3bdb9746281f31603 [2022-07-22 09:25:22,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:25:22,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:25:22,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:25:22,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:25:22,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:25:22,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:25:22" (1/1) ... [2022-07-22 09:25:22,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af2c098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:22, skipping insertion in model container [2022-07-22 09:25:22,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:25:22" (1/1) ... [2022-07-22 09:25:22,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:25:22,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:25:23,116 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-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-07-22 09:25:23,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:25:23,125 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:25:23,138 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-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-07-22 09:25:23,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:25:23,151 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:25:23,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23 WrapperNode [2022-07-22 09:25:23,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:25:23,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:25:23,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:25:23,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:25:23,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,184 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-07-22 09:25:23,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:25:23,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:25:23,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:25:23,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:25:23,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:25:23,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:25:23,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:25:23,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:25:23,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (1/1) ... [2022-07-22 09:25:23,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:25:23,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:25:23,236 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) [2022-07-22 09:25:23,239 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 [2022-07-22 09:25:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:25:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:25:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:25:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:25:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:25:23,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:25:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:25:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:25:23,325 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:25:23,327 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:25:23,403 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:25:23,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:25:23,408 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 09:25:23,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:25:23 BoogieIcfgContainer [2022-07-22 09:25:23,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:25:23,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:25:23,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:25:23,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:25:23,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:25:22" (1/3) ... [2022-07-22 09:25:23,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7bf0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:25:23, skipping insertion in model container [2022-07-22 09:25:23,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:25:23" (2/3) ... [2022-07-22 09:25:23,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7bf0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:25:23, skipping insertion in model container [2022-07-22 09:25:23,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:25:23" (3/3) ... [2022-07-22 09:25:23,418 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2022-07-22 09:25:23,429 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:25:23,430 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:25:23,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:25:23,473 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@2ee7d826, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@279e7433 [2022-07-22 09:25:23,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:25:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 09:25:23,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:23,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:23,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1960333522, now seen corresponding path program 1 times [2022-07-22 09:25:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454969354] [2022-07-22 09:25:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:25:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:23,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454969354] [2022-07-22 09:25:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454969354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:25:23,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:25:23,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:25:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056206397] [2022-07-22 09:25:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:25:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:25:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:25:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:25:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:25:23,755 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:25:23,775 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2022-07-22 09:25:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:25:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 09:25:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:25:23,783 INFO L225 Difference]: With dead ends: 26 [2022-07-22 09:25:23,783 INFO L226 Difference]: Without dead ends: 13 [2022-07-22 09:25:23,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:25:23,788 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:25:23,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:25:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-22 09:25:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-07-22 09:25:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-22 09:25:23,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-07-22 09:25:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:25:23,815 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-22 09:25:23,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-22 09:25:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 09:25:23,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:23,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:23,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:25:23,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1620761708, now seen corresponding path program 1 times [2022-07-22 09:25:23,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448257373] [2022-07-22 09:25:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:25:23,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448257373] [2022-07-22 09:25:23,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448257373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:25:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578750156] [2022-07-22 09:25:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:23,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:23,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:25:23,868 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) [2022-07-22 09:25:23,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:25:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:25:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:25:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:25:23,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:25:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:25:23,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578750156] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:25:23,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:25:23,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:25:23,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140353428] [2022-07-22 09:25:23,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:25:23,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:25:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:25:23,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:25:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:25:23,977 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:25:23,999 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-07-22 09:25:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:25:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 09:25:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:25:24,001 INFO L225 Difference]: With dead ends: 25 [2022-07-22 09:25:24,001 INFO L226 Difference]: Without dead ends: 18 [2022-07-22 09:25:24,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:25:24,003 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:25:24,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:25:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-22 09:25:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-22 09:25:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-22 09:25:24,007 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2022-07-22 09:25:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:25:24,007 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-22 09:25:24,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:24,008 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-22 09:25:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 09:25:24,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:24,008 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:24,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 09:25:24,222 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 [2022-07-22 09:25:24,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash 47568678, now seen corresponding path program 2 times [2022-07-22 09:25:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:24,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033379527] [2022-07-22 09:25:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:25:24,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:24,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033379527] [2022-07-22 09:25:24,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033379527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:25:24,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:25:24,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 09:25:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991288502] [2022-07-22 09:25:24,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:25:24,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 09:25:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:25:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 09:25:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:25:24,306 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. 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) [2022-07-22 09:25:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:25:24,342 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-07-22 09:25:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:25:24,343 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 17 [2022-07-22 09:25:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:25:24,344 INFO L225 Difference]: With dead ends: 23 [2022-07-22 09:25:24,344 INFO L226 Difference]: Without dead ends: 20 [2022-07-22 09:25:24,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:25:24,346 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:25:24,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:25:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-22 09:25:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-22 09:25:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-22 09:25:24,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-07-22 09:25:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:25:24,353 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-22 09:25:24,353 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) [2022-07-22 09:25:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-22 09:25:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 09:25:24,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:24,355 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:24,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 09:25:24,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1533228919, now seen corresponding path program 1 times [2022-07-22 09:25:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:24,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064530900] [2022-07-22 09:25:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:24,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:25:24,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:24,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064530900] [2022-07-22 09:25:24,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064530900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:25:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445751485] [2022-07-22 09:25:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:24,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:24,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:25:24,477 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) [2022-07-22 09:25:24,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:25:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:24,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:25:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:25:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:25:24,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:25:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:25:24,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445751485] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:25:24,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:25:24,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-22 09:25:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114733888] [2022-07-22 09:25:24,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:25:24,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:25:24,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:25:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:25:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:25:24,666 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:25:24,718 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-22 09:25:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:25:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-22 09:25:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:25:24,722 INFO L225 Difference]: With dead ends: 41 [2022-07-22 09:25:24,722 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 09:25:24,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:25:24,726 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:25:24,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:25:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 09:25:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-22 09:25:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-22 09:25:24,736 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2022-07-22 09:25:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:25:24,736 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-22 09:25:24,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-22 09:25:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 09:25:24,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:24,738 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:24,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:25:24,952 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,SelfDestructingSolverStorable3 [2022-07-22 09:25:24,952 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1092675971, now seen corresponding path program 2 times [2022-07-22 09:25:24,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:24,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145280863] [2022-07-22 09:25:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:25:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:25,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145280863] [2022-07-22 09:25:25,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145280863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:25:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963768656] [2022-07-22 09:25:25,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:25:25,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:25,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:25:25,164 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) [2022-07-22 09:25:25,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:25:25,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:25:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:25:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:25:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:25:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:25:25,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:25:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:25:25,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963768656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:25:25,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:25:25,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-22 09:25:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784023416] [2022-07-22 09:25:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:25:25,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:25:25,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:25:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:25:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:25:25,489 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:25:25,553 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-07-22 09:25:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:25:25,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 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 31 [2022-07-22 09:25:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:25:25,555 INFO L225 Difference]: With dead ends: 65 [2022-07-22 09:25:25,555 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 09:25:25,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:25:25,557 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:25:25,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:25:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 09:25:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-22 09:25:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-07-22 09:25:25,564 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2022-07-22 09:25:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:25:25,564 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-07-22 09:25:25,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-07-22 09:25:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 09:25:25,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:25,566 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:25,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:25:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:25,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1116944283, now seen corresponding path program 3 times [2022-07-22 09:25:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:25,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161562054] [2022-07-22 09:25:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:25:26,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:26,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161562054] [2022-07-22 09:25:26,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161562054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:25:26,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316265784] [2022-07-22 09:25:26,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:25:26,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:25:26,184 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) [2022-07-22 09:25:26,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:25:26,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 09:25:26,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:25:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 09:25:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:25:26,323 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 15 treesize of output 11 [2022-07-22 09:25:26,367 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:25:26,367 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 23 treesize of output 23 [2022-07-22 09:25:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-22 09:25:26,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:25:26,610 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 [2022-07-22 09:25:26,616 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 28 [2022-07-22 09:25:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-22 09:25:26,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316265784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:25:26,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:25:26,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 33 [2022-07-22 09:25:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043986276] [2022-07-22 09:25:26,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:25:26,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 09:25:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:25:26,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 09:25:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:25:26,631 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:25:26,777 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-07-22 09:25:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 09:25:26,777 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-22 09:25:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:25:26,780 INFO L225 Difference]: With dead ends: 71 [2022-07-22 09:25:26,780 INFO L226 Difference]: Without dead ends: 61 [2022-07-22 09:25:26,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=849, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 09:25:26,782 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:25:26,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 90 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-07-22 09:25:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-22 09:25:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-07-22 09:25:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-22 09:25:26,789 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2022-07-22 09:25:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:25:26,790 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-22 09:25:26,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-22 09:25:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 09:25:26,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:26,791 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:26,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:25:27,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:27,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash 739565382, now seen corresponding path program 4 times [2022-07-22 09:25:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988408734] [2022-07-22 09:25:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:25:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988408734] [2022-07-22 09:25:27,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988408734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:25:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195707665] [2022-07-22 09:25:27,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:25:27,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:27,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:25:27,392 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) [2022-07-22 09:25:27,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:25:27,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:25:27,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:25:27,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:25:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:25:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:25:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:25:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:25:28,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195707665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:25:28,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:25:28,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-07-22 09:25:28,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914375755] [2022-07-22 09:25:28,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:25:28,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-22 09:25:28,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:25:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-22 09:25:28,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 09:25:28,308 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:25:28,458 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-07-22 09:25:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-22 09:25:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 59 [2022-07-22 09:25:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:25:28,460 INFO L225 Difference]: With dead ends: 121 [2022-07-22 09:25:28,460 INFO L226 Difference]: Without dead ends: 110 [2022-07-22 09:25:28,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 09:25:28,462 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:25:28,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 42 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:25:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-22 09:25:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-22 09:25:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-22 09:25:28,471 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 59 [2022-07-22 09:25:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:25:28,471 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-22 09:25:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:25:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-22 09:25:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 09:25:28,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:25:28,473 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:25:28,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:25:28,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:28,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:25:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:25:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash -736649004, now seen corresponding path program 5 times [2022-07-22 09:25:28,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:25:28,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090476177] [2022-07-22 09:25:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:25:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:25:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:25:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:25:29,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:25:29,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090476177] [2022-07-22 09:25:29,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090476177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:25:29,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254799113] [2022-07-22 09:25:29,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:25:29,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:25:29,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:25:29,736 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) [2022-07-22 09:25:29,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:26:44,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-07-22 09:26:44,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:26:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 09:26:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:26:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:26:44,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:26:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:26:47,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254799113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:26:47,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:26:47,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-07-22 09:26:47,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764392090] [2022-07-22 09:26:47,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:26:47,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-22 09:26:47,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:26:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-22 09:26:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-22 09:26:47,586 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:26:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:26:47,847 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2022-07-22 09:26:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-22 09:26:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 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 109 [2022-07-22 09:26:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:26:47,851 INFO L225 Difference]: With dead ends: 221 [2022-07-22 09:26:47,851 INFO L226 Difference]: Without dead ends: 210 [2022-07-22 09:26:47,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-22 09:26:47,854 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:26:47,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:26:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-22 09:26:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-07-22 09:26:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:26:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-07-22 09:26:47,882 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 109 [2022-07-22 09:26:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:26:47,882 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-07-22 09:26:47,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:26:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-07-22 09:26:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-22 09:26:47,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:26:47,887 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:26:47,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 09:26:48,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:26:48,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:26:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:26:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash 929351024, now seen corresponding path program 6 times [2022-07-22 09:26:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:26:48,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914497725] [2022-07-22 09:26:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:26:48,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:26:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:26:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:26:51,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:26:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914497725] [2022-07-22 09:26:51,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914497725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:26:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451600888] [2022-07-22 09:26:51,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:26:51,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:26:51,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:26:51,421 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) [2022-07-22 09:26:51,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:26:51,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 09:26:51,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:26:51,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:26:51,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:26:51,607 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 15 treesize of output 11 [2022-07-22 09:26:51,814 INFO L356 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-07-22 09:26:51,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2022-07-22 09:26:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-07-22 09:26:52,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:26:52,431 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 33 treesize of output 29 [2022-07-22 09:26:52,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:26:52,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2022-07-22 09:26:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-07-22 09:26:52,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451600888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:26:52,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:26:52,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 9, 9] total 113 [2022-07-22 09:26:52,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044133489] [2022-07-22 09:26:52,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:26:52,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-22 09:26:52,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:26:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-22 09:26:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5097, Invalid=7559, Unknown=0, NotChecked=0, Total=12656 [2022-07-22 09:26:52,497 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 113 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:26:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:26:53,166 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2022-07-22 09:26:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-07-22 09:26:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 113 states have internal predecessors, (226), 0 states have call successors, (0), 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 209 [2022-07-22 09:26:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:26:53,167 INFO L225 Difference]: With dead ends: 230 [2022-07-22 09:26:53,167 INFO L226 Difference]: Without dead ends: 217 [2022-07-22 09:26:53,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 404 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5153, Invalid=8889, Unknown=0, NotChecked=0, Total=14042 [2022-07-22 09:26:53,173 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:26:53,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 45 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-22 09:26:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-22 09:26:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-07-22 09:26:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:26:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-07-22 09:26:53,193 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 209 [2022-07-22 09:26:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:26:53,194 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-07-22 09:26:53,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 113 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:26:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-07-22 09:26:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-22 09:26:53,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:26:53,200 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:26:53,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:26:53,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:26:53,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:26:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:26:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1504176460, now seen corresponding path program 7 times [2022-07-22 09:26:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:26:53,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256482007] [2022-07-22 09:26:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:26:53,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:26:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:26:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 09:26:56,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:26:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256482007] [2022-07-22 09:26:56,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256482007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:26:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019650516] [2022-07-22 09:26:56,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:26:56,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:26:56,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:26:56,741 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) [2022-07-22 09:26:56,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:26:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:26:56,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-22 09:26:56,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:26:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 09:26:57,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:27:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 09:27:06,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019650516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:27:06,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:27:06,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2022-07-22 09:27:06,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049429294] [2022-07-22 09:27:06,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:27:06,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-07-22 09:27:06,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:06,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-07-22 09:27:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-22 09:27:06,441 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:27:07,190 INFO L93 Difference]: Finished difference Result 433 states and 535 transitions. [2022-07-22 09:27:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-22 09:27:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-07-22 09:27:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:27:07,194 INFO L225 Difference]: With dead ends: 433 [2022-07-22 09:27:07,194 INFO L226 Difference]: Without dead ends: 418 [2022-07-22 09:27:07,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-22 09:27:07,198 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:27:07,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 50 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:27:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-22 09:27:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-07-22 09:27:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0047961630695443) internal successors, (419), 417 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 419 transitions. [2022-07-22 09:27:07,210 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 419 transitions. Word has length 215 [2022-07-22 09:27:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:27:07,211 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 419 transitions. [2022-07-22 09:27:07,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 419 transitions. [2022-07-22 09:27:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-07-22 09:27:07,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:07,222 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:07,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 09:27:07,443 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,SelfDestructingSolverStorable9 [2022-07-22 09:27:07,443 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2094532266, now seen corresponding path program 8 times [2022-07-22 09:27:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824442895] [2022-07-22 09:27:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 09:27:19,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:19,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824442895] [2022-07-22 09:27:19,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824442895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:27:19,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706256011] [2022-07-22 09:27:19,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:27:19,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:19,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:19,972 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) [2022-07-22 09:27:19,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:27:20,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:27:20,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:27:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 202 conjunts are in the unsatisfiable core [2022-07-22 09:27:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:27:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 09:27:20,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:27:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 09:27:56,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706256011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:27:56,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:27:56,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2022-07-22 09:27:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945050970] [2022-07-22 09:27:56,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:27:56,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-07-22 09:27:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-07-22 09:27:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-07-22 09:27:56,541 INFO L87 Difference]: Start difference. First operand 418 states and 419 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:28:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:28:00,004 INFO L93 Difference]: Finished difference Result 837 states and 1040 transitions. [2022-07-22 09:28:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-07-22 09:28:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 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 417 [2022-07-22 09:28:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:28:00,008 INFO L225 Difference]: With dead ends: 837 [2022-07-22 09:28:00,009 INFO L226 Difference]: Without dead ends: 822 [2022-07-22 09:28:00,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-07-22 09:28:00,020 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 603 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:28:00,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 66 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 09:28:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-07-22 09:28:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2022-07-22 09:28:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.002436053593179) internal successors, (823), 821 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:28:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 823 transitions. [2022-07-22 09:28:00,043 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 823 transitions. Word has length 417 [2022-07-22 09:28:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:28:00,044 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 823 transitions. [2022-07-22 09:28:00,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:28:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 823 transitions. [2022-07-22 09:28:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-07-22 09:28:00,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:28:00,065 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:28:00,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:28:00,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:28:00,280 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:28:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:28:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 482288662, now seen corresponding path program 9 times [2022-07-22 09:28:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:28:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066735629] [2022-07-22 09:28:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:28:00,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:28:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:28:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 09:28:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:28:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066735629] [2022-07-22 09:28:48,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066735629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:28:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211277816] [2022-07-22 09:28:48,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:28:48,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:28:48,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:28:48,260 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) [2022-07-22 09:28:48,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:28:48,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 09:28:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:28:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:28:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:28:48,781 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 15 treesize of output 11 [2022-07-22 09:28:50,392 INFO L356 Elim1Store]: treesize reduction 52, result has 62.0 percent of original size [2022-07-22 09:28:50,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 103 [2022-07-22 09:28:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-07-22 09:28:51,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:28:53,463 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 67 treesize of output 59 [2022-07-22 09:28:53,498 INFO L356 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2022-07-22 09:28:53,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 149 [2022-07-22 09:28:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-07-22 09:28:53,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211277816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:28:53,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:28:53,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 13, 13] total 425 [2022-07-22 09:28:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756667334] [2022-07-22 09:28:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:28:53,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 425 states [2022-07-22 09:28:53,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:28:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 425 interpolants. [2022-07-22 09:28:53,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81923, Invalid=98277, Unknown=0, NotChecked=0, Total=180200 [2022-07-22 09:28:53,774 INFO L87 Difference]: Start difference. First operand 822 states and 823 transitions. Second operand has 425 states, 425 states have (on average 1.9811764705882353) internal successors, (842), 425 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:29:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:29:00,153 INFO L93 Difference]: Finished difference Result 849 states and 855 transitions. [2022-07-22 09:29:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 422 states. [2022-07-22 09:29:00,154 INFO L78 Accepts]: Start accepts. Automaton has has 425 states, 425 states have (on average 1.9811764705882353) internal successors, (842), 425 states have internal predecessors, (842), 0 states have call successors, (0), 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 821 [2022-07-22 09:29:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:29:00,157 INFO L225 Difference]: With dead ends: 849 [2022-07-22 09:29:00,157 INFO L226 Difference]: Without dead ends: 833 [2022-07-22 09:29:00,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2052 GetRequests, 1620 SyntacticMatches, 2 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9115 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=82003, Invalid=104189, Unknown=0, NotChecked=0, Total=186192 [2022-07-22 09:29:00,168 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 414 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:29:00,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 76 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 961 Invalid, 0 Unknown, 148 Unchecked, 0.8s Time] [2022-07-22 09:29:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-07-22 09:29:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 832. [2022-07-22 09:29:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 1.0024067388688327) internal successors, (833), 831 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:29:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 833 transitions. [2022-07-22 09:29:00,193 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 833 transitions. Word has length 821 [2022-07-22 09:29:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:29:00,194 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 833 transitions. [2022-07-22 09:29:00,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 425 states, 425 states have (on average 1.9811764705882353) internal successors, (842), 425 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:29:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 833 transitions. [2022-07-22 09:29:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-07-22 09:29:00,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:29:00,211 INFO L195 NwaCegarLoop]: trace histogram [403, 403, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:29:00,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:29:00,427 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,SelfDestructingSolverStorable11 [2022-07-22 09:29:00,427 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:29:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:29:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash 838162272, now seen corresponding path program 10 times [2022-07-22 09:29:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:29:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845451966] [2022-07-22 09:29:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:29:00,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:29:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat