./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/reducercommutativity/sep05-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:03:50,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:03:50,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:03:50,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:03:50,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:03:51,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:03:51,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:03:51,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:03:51,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:03:51,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:03:51,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:03:51,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:03:51,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:03:51,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:03:51,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:03:51,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:03:51,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:03:51,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:03:51,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:03:51,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:03:51,039 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:03:51,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:03:51,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:03:51,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:03:51,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:03:51,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:03:51,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:03:51,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:03:51,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:03:51,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:03:51,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:03:51,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:03:51,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:03:51,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:03:51,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:03:51,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:03:51,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:03:51,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:03:51,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:03:51,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:03:51,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:03:51,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:03:51,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:03:51,100 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:03:51,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:03:51,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:03:51,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:03:51,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:03:51,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:03:51,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:03:51,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:03:51,103 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:03:51,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:03:51,104 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:03:51,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:03:51,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:03:51,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:03:51,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:03:51,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:03:51,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:03:51,105 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:03:51,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:03:51,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:03:51,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:03:51,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:03:51,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:03:51,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:03:51,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:03:51,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:03:51,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:03:51,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:03:51,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:03:51,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:03:51,121 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:03:51,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:03:51,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:03:51,121 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2022-07-13 10:03:51,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:03:51,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:03:51,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:03:51,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:03:51,408 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:03:51,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-07-13 10:03:51,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4724e6f8a/8b2edad15ed44d4dbed9a9b8a2eaae48/FLAG86aa7ac4d [2022-07-13 10:03:51,904 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:03:51,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-07-13 10:03:51,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4724e6f8a/8b2edad15ed44d4dbed9a9b8a2eaae48/FLAG86aa7ac4d [2022-07-13 10:03:52,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4724e6f8a/8b2edad15ed44d4dbed9a9b8a2eaae48 [2022-07-13 10:03:52,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:03:52,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:03:52,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:03:52,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:03:52,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:03:52,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1adff039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52, skipping insertion in model container [2022-07-13 10:03:52,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:03:52,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:03:52,538 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/reducercommutativity/sep05-1.i[1287,1300] [2022-07-13 10:03:52,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:03:52,550 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:03:52,588 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/reducercommutativity/sep05-1.i[1287,1300] [2022-07-13 10:03:52,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:03:52,603 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:03:52,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52 WrapperNode [2022-07-13 10:03:52,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:03:52,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:03:52,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:03:52,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:03:52,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,647 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-13 10:03:52,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:03:52,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:03:52,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:03:52,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:03:52,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:03:52,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:03:52,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:03:52,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:03:52,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (1/1) ... [2022-07-13 10:03:52,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:03:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:52,730 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) [2022-07-13 10:03:52,739 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 [2022-07-13 10:03:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:03:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:03:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:03:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:03:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:03:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:03:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:03:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:03:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-13 10:03:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-13 10:03:52,888 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:03:52,890 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:03:53,124 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:03:53,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:03:53,143 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 10:03:53,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:03:53 BoogieIcfgContainer [2022-07-13 10:03:53,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:03:53,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:03:53,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:03:53,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:03:53,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:03:52" (1/3) ... [2022-07-13 10:03:53,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2346d326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:03:53, skipping insertion in model container [2022-07-13 10:03:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:52" (2/3) ... [2022-07-13 10:03:53,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2346d326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:03:53, skipping insertion in model container [2022-07-13 10:03:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:03:53" (3/3) ... [2022-07-13 10:03:53,154 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2022-07-13 10:03:53,173 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:03:53,176 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:03:53,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:03:53,250 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@df09d2c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a0ab65f [2022-07-13 10:03:53,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:03:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:03:53,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:53,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:53,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:53,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-07-13 10:03:53,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:53,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221087418] [2022-07-13 10:03:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 10:03:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:03:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:53,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:53,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221087418] [2022-07-13 10:03:53,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221087418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:53,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:03:53,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:03:53,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635497661] [2022-07-13 10:03:53,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:53,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:03:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:03:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:03:53,516 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:03:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:53,574 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-07-13 10:03:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:03:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 10:03:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:53,581 INFO L225 Difference]: With dead ends: 52 [2022-07-13 10:03:53,581 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:03:53,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:03:53,589 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 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 [2022-07-13 10:03:53,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:03:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-13 10:03:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-13 10:03:53,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-13 10:03:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:53,617 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-13 10:03:53,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:03:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-13 10:03:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 10:03:53,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:53,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:53,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:03:53,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-07-13 10:03:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:53,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130671401] [2022-07-13 10:03:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:03:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 10:03:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:03:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:53,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:53,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130671401] [2022-07-13 10:03:53,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130671401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:53,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594092713] [2022-07-13 10:03:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:53,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:53,753 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) [2022-07-13 10:03:53,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:03:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:03:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:03:53,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:03:53,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594092713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:53,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:03:53,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 10:03:53,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196854527] [2022-07-13 10:03:53,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:03:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:03:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:03:53,871 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:53,882 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-13 10:03:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:03:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-13 10:03:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:53,883 INFO L225 Difference]: With dead ends: 45 [2022-07-13 10:03:53,884 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:03:53,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:03:53,885 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 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 [2022-07-13 10:03:53,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:03:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-13 10:03:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-13 10:03:53,892 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-07-13 10:03:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:53,892 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-13 10:03:53,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-13 10:03:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:03:53,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:53,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:53,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:54,115 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 [2022-07-13 10:03:54,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-07-13 10:03:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:54,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145891132] [2022-07-13 10:03:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:54,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:03:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 10:03:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:03:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 10:03:54,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145891132] [2022-07-13 10:03:54,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145891132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:54,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500261345] [2022-07-13 10:03:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:54,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:54,215 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) [2022-07-13 10:03:54,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:03:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:03:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 10:03:54,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:03:54,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500261345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:54,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:03:54,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 10:03:54,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520232918] [2022-07-13 10:03:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:54,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:03:54,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:03:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:54,364 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:54,383 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-13 10:03:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:03:54,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-13 10:03:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:54,385 INFO L225 Difference]: With dead ends: 41 [2022-07-13 10:03:54,385 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:03:54,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:54,389 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:54,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:03:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-13 10:03:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-13 10:03:54,402 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-07-13 10:03:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:54,403 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-13 10:03:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-13 10:03:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 10:03:54,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:54,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:54,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:54,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 10:03:54,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-07-13 10:03:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:54,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807161692] [2022-07-13 10:03:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:03:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 10:03:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 10:03:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:54,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807161692] [2022-07-13 10:03:54,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807161692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:54,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971434381] [2022-07-13 10:03:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:54,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:54,742 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) [2022-07-13 10:03:54,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:03:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:03:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:03:54,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:03:54,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971434381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:54,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:54,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-13 10:03:54,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548312589] [2022-07-13 10:03:54,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:54,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:03:54,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:54,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:03:54,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:03:54,928 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:03:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:54,995 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-13 10:03:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:03:54,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-13 10:03:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:54,999 INFO L225 Difference]: With dead ends: 58 [2022-07-13 10:03:55,000 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 10:03:55,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:03:55,002 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:55,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 10:03:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-13 10:03:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-13 10:03:55,012 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-07-13 10:03:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-13 10:03:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:03:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-13 10:03:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 10:03:55,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:55,018 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:55,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:55,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:55,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-07-13 10:03:55,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:55,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826008321] [2022-07-13 10:03:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 10:03:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 10:03:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:03:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-13 10:03:55,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826008321] [2022-07-13 10:03:55,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826008321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291039347] [2022-07-13 10:03:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:03:55,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:55,401 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) [2022-07-13 10:03:55,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:03:55,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:03:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:03:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 10:03:55,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 10:03:55,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291039347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:55,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:55,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2022-07-13 10:03:55,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461578572] [2022-07-13 10:03:55,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:03:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:03:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:03:55,581 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:03:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:55,613 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-07-13 10:03:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 10:03:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-07-13 10:03:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:55,614 INFO L225 Difference]: With dead ends: 64 [2022-07-13 10:03:55,614 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 10:03:55,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:03:55,616 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:55,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 10:03:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-07-13 10:03:55,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-07-13 10:03:55,622 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 56 [2022-07-13 10:03:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:55,622 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-07-13 10:03:55,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:03:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-07-13 10:03:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 10:03:55,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:55,624 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:55,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:55,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:55,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:55,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1253498369, now seen corresponding path program 3 times [2022-07-13 10:03:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:55,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184934806] [2022-07-13 10:03:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:03:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:03:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:03:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-13 10:03:55,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184934806] [2022-07-13 10:03:55,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184934806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733393787] [2022-07-13 10:03:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:03:55,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:55,992 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) [2022-07-13 10:03:55,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:03:56,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:03:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:03:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-13 10:03:56,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-13 10:03:56,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733393787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:56,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:56,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-13 10:03:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023394406] [2022-07-13 10:03:56,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:56,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 10:03:56,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 10:03:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:56,164 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:03:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:56,194 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-07-13 10:03:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:03:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-07-13 10:03:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:56,195 INFO L225 Difference]: With dead ends: 73 [2022-07-13 10:03:56,195 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 10:03:56,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:56,196 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:56,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 10:03:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-13 10:03:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-13 10:03:56,202 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 60 [2022-07-13 10:03:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:56,203 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-13 10:03:56,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:03:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-13 10:03:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 10:03:56,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:56,205 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:56,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:56,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:56,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash -156103101, now seen corresponding path program 4 times [2022-07-13 10:03:56,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:56,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140118882] [2022-07-13 10:03:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:56,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:03:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:03:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:03:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-13 10:03:56,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140118882] [2022-07-13 10:03:56,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140118882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824318568] [2022-07-13 10:03:56,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:03:56,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:56,572 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) [2022-07-13 10:03:56,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:03:56,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:03:56,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:56,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:03:56,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-13 10:03:56,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-13 10:03:56,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824318568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:56,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:56,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-13 10:03:56,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901542984] [2022-07-13 10:03:56,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:56,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 10:03:56,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 10:03:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:56,723 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:03:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:56,741 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2022-07-13 10:03:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:03:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 87 [2022-07-13 10:03:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:56,742 INFO L225 Difference]: With dead ends: 78 [2022-07-13 10:03:56,742 INFO L226 Difference]: Without dead ends: 52 [2022-07-13 10:03:56,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:56,744 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:56,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 95 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-13 10:03:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-13 10:03:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-13 10:03:56,749 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 87 [2022-07-13 10:03:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:56,750 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-13 10:03:56,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:03:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-13 10:03:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:03:56,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:56,751 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:56,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:56,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2081062919, now seen corresponding path program 5 times [2022-07-13 10:03:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:56,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599155330] [2022-07-13 10:03:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:56,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:03:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:03:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:03:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-13 10:03:57,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599155330] [2022-07-13 10:03:57,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599155330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389575071] [2022-07-13 10:03:57,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:03:57,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:57,791 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) [2022-07-13 10:03:57,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:03:58,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-13 10:03:58,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 10:03:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-13 10:03:58,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 4 proven. 315 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-13 10:03:59,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389575071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:59,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:59,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 25 [2022-07-13 10:03:59,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816247139] [2022-07-13 10:03:59,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:59,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 10:03:59,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 10:03:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:03:59,375 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 10:03:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:59,683 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2022-07-13 10:03:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 10:03:59,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 91 [2022-07-13 10:03:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:59,687 INFO L225 Difference]: With dead ends: 147 [2022-07-13 10:03:59,688 INFO L226 Difference]: Without dead ends: 143 [2022-07-13 10:03:59,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:03:59,689 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:59,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1215 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:03:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-13 10:03:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2022-07-13 10:03:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.26) internal successors, (126), 101 states have internal predecessors, (126), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-13 10:03:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-07-13 10:03:59,722 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 91 [2022-07-13 10:03:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:59,723 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-07-13 10:03:59,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 10:03:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-07-13 10:03:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:03:59,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:59,726 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:59,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:59,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:59,952 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1533846007, now seen corresponding path program 1 times [2022-07-13 10:03:59,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:59,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622293361] [2022-07-13 10:03:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:59,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:04:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:04:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:04:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 89 proven. 264 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-13 10:04:00,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:00,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622293361] [2022-07-13 10:04:00,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622293361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:00,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428058753] [2022-07-13 10:04:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:00,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:00,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:00,617 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) [2022-07-13 10:04:00,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:04:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-13 10:04:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:01,026 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 23 treesize of output 11 [2022-07-13 10:04:01,064 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 17 treesize of output 13 [2022-07-13 10:04:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 181 proven. 132 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-13 10:04:01,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:02,168 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-13 10:04:02,169 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 24 treesize of output 23 [2022-07-13 10:04:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 191 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-13 10:04:02,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428058753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:02,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:02,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 15] total 45 [2022-07-13 10:04:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490631501] [2022-07-13 10:04:02,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 10:04:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 10:04:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1826, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 10:04:02,215 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-13 10:04:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:04,586 INFO L93 Difference]: Finished difference Result 443 states and 648 transitions. [2022-07-13 10:04:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 10:04:04,587 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 91 [2022-07-13 10:04:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:04,591 INFO L225 Difference]: With dead ends: 443 [2022-07-13 10:04:04,591 INFO L226 Difference]: Without dead ends: 317 [2022-07-13 10:04:04,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=607, Invalid=6199, Unknown=0, NotChecked=0, Total=6806 [2022-07-13 10:04:04,597 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 188 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:04,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 558 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1053 Invalid, 0 Unknown, 508 Unchecked, 0.7s Time] [2022-07-13 10:04:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-13 10:04:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2022-07-13 10:04:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 249 states have (on average 1.3373493975903614) internal successors, (333), 254 states have internal predecessors, (333), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68) [2022-07-13 10:04:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 412 transitions. [2022-07-13 10:04:04,636 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 412 transitions. Word has length 91 [2022-07-13 10:04:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:04,636 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 412 transitions. [2022-07-13 10:04:04,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-13 10:04:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 412 transitions. [2022-07-13 10:04:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:04:04,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:04,640 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:04,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 10:04:04,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1955738939, now seen corresponding path program 2 times [2022-07-13 10:04:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:04,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778892789] [2022-07-13 10:04:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:05,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:04:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:05,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:04:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:05,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:04:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-13 10:04:05,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778892789] [2022-07-13 10:04:05,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778892789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016644882] [2022-07-13 10:04:05,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:04:05,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:05,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:05,712 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) [2022-07-13 10:04:05,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:04:05,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:04:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:04:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-13 10:04:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:06,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-07-13 10:04:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:06,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-13 10:04:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:06,375 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:04:06,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-07-13 10:04:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 12 proven. 366 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 10:04:06,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:13,913 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-13 10:04:13,913 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 38 treesize of output 31 [2022-07-13 10:04:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 107 proven. 244 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 10:04:14,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016644882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:14,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:14,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 24] total 59 [2022-07-13 10:04:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145965957] [2022-07-13 10:04:14,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-13 10:04:14,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-13 10:04:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3173, Unknown=10, NotChecked=0, Total=3422 [2022-07-13 10:04:14,160 INFO L87 Difference]: Start difference. First operand 269 states and 412 transitions. Second operand has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 10:04:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:17,175 INFO L93 Difference]: Finished difference Result 956 states and 1525 transitions. [2022-07-13 10:04:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 10:04:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 91 [2022-07-13 10:04:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:17,181 INFO L225 Difference]: With dead ends: 956 [2022-07-13 10:04:17,182 INFO L226 Difference]: Without dead ends: 672 [2022-07-13 10:04:17,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 169 SyntacticMatches, 16 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=704, Invalid=8216, Unknown=10, NotChecked=0, Total=8930 [2022-07-13 10:04:17,187 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 200 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 876 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:17,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1245 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1640 Invalid, 0 Unknown, 876 Unchecked, 1.0s Time] [2022-07-13 10:04:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-07-13 10:04:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 583. [2022-07-13 10:04:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 544 states have (on average 1.3474264705882353) internal successors, (733), 559 states have internal predecessors, (733), 17 states have call successors, (17), 6 states have call predecessors, (17), 21 states have return successors, (208), 17 states have call predecessors, (208), 17 states have call successors, (208) [2022-07-13 10:04:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 958 transitions. [2022-07-13 10:04:17,257 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 958 transitions. Word has length 91 [2022-07-13 10:04:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:17,257 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 958 transitions. [2022-07-13 10:04:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 10:04:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 958 transitions. [2022-07-13 10:04:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:04:17,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:17,264 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:17,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:17,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:04:17,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash 801199241, now seen corresponding path program 3 times [2022-07-13 10:04:17,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:17,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123052525] [2022-07-13 10:04:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:17,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:04:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:17,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:04:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:04:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 190 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 10:04:18,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:18,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123052525] [2022-07-13 10:04:18,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123052525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:18,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613310519] [2022-07-13 10:04:18,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:04:18,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:18,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:18,361 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) [2022-07-13 10:04:18,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:04:18,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-13 10:04:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:04:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-13 10:04:18,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:18,693 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 [2022-07-13 10:04:18,704 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 [2022-07-13 10:04:18,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:18,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-07-13 10:04:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:19,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-07-13 10:04:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:19,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-13 10:04:19,086 INFO L356 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2022-07-13 10:04:19,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 46 [2022-07-13 10:04:19,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:19,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:19,293 INFO L356 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2022-07-13 10:04:19,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 72 [2022-07-13 10:04:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:19,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-07-13 10:04:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 214 proven. 137 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 10:04:20,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:20,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613310519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:20,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:04:20,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 50 [2022-07-13 10:04:20,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889968498] [2022-07-13 10:04:20,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:20,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 10:04:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:20,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 10:04:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2368, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 10:04:20,175 INFO L87 Difference]: Start difference. First operand 583 states and 958 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:04:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:39,125 INFO L93 Difference]: Finished difference Result 2551 states and 4576 transitions. [2022-07-13 10:04:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-07-13 10:04:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 10:04:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:39,144 INFO L225 Difference]: With dead ends: 2551 [2022-07-13 10:04:39,145 INFO L226 Difference]: Without dead ends: 2165 [2022-07-13 10:04:39,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16915 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=2878, Invalid=40161, Unknown=17, NotChecked=0, Total=43056 [2022-07-13 10:04:39,160 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1878 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:39,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 341 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1167 Invalid, 0 Unknown, 1878 Unchecked, 0.7s Time] [2022-07-13 10:04:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2022-07-13 10:04:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1626. [2022-07-13 10:04:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1552 states have (on average 1.4149484536082475) internal successors, (2196), 1590 states have internal predecessors, (2196), 25 states have call successors, (25), 10 states have call predecessors, (25), 48 states have return successors, (610), 25 states have call predecessors, (610), 25 states have call successors, (610) [2022-07-13 10:04:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2831 transitions. [2022-07-13 10:04:39,478 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2831 transitions. Word has length 91 [2022-07-13 10:04:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:39,479 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 2831 transitions. [2022-07-13 10:04:39,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:04:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2831 transitions. [2022-07-13 10:04:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:04:39,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:39,493 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:39,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:39,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 10:04:39,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash 86918213, now seen corresponding path program 4 times [2022-07-13 10:04:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:39,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179191476] [2022-07-13 10:04:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:39,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:40,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:04:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:40,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:04:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:40,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:04:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 188 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-13 10:04:40,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:40,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179191476] [2022-07-13 10:04:40,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179191476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:40,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933572159] [2022-07-13 10:04:40,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:04:40,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:40,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:04:40,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:04:40,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:04:40,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:04:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-13 10:04:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:40,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:41,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:41,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-07-13 10:04:41,235 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-13 10:04:41,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2022-07-13 10:04:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:41,363 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-07-13 10:04:41,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 56 [2022-07-13 10:04:41,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:41,590 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-13 10:04:41,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 93 [2022-07-13 10:04:42,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:42,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-07-13 10:04:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:42,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-07-13 10:04:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 6 proven. 382 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 10:04:42,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:12,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933572159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:12,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:05:12,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 50 [2022-07-13 10:05:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505558656] [2022-07-13 10:05:12,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 10:05:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 10:05:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3460, Unknown=21, NotChecked=0, Total=3782 [2022-07-13 10:05:12,756 INFO L87 Difference]: Start difference. First operand 1626 states and 2831 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:05:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:16,270 INFO L93 Difference]: Finished difference Result 4661 states and 7861 transitions. [2022-07-13 10:05:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-13 10:05:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 91 [2022-07-13 10:05:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:16,295 INFO L225 Difference]: With dead ends: 4661 [2022-07-13 10:05:16,295 INFO L226 Difference]: Without dead ends: 2801 [2022-07-13 10:05:16,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 107 SyntacticMatches, 12 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=1054, Invalid=10915, Unknown=21, NotChecked=0, Total=11990 [2022-07-13 10:05:16,309 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:16,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 956 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1350 Invalid, 0 Unknown, 1237 Unchecked, 0.7s Time] [2022-07-13 10:05:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2022-07-13 10:05:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2400. [2022-07-13 10:05:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2278 states have (on average 1.3928884986830554) internal successors, (3173), 2336 states have internal predecessors, (3173), 42 states have call successors, (42), 21 states have call predecessors, (42), 79 states have return successors, (998), 42 states have call predecessors, (998), 42 states have call successors, (998) [2022-07-13 10:05:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 4213 transitions. [2022-07-13 10:05:16,727 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 4213 transitions. Word has length 91 [2022-07-13 10:05:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:16,728 INFO L495 AbstractCegarLoop]: Abstraction has 2400 states and 4213 transitions. [2022-07-13 10:05:16,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:05:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 4213 transitions. [2022-07-13 10:05:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:05:16,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:16,750 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:16,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 10:05:16,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1791202551, now seen corresponding path program 5 times [2022-07-13 10:05:16,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:16,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413805125] [2022-07-13 10:05:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:17,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:05:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:17,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:05:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:17,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:05:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 172 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 10:05:17,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:17,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413805125] [2022-07-13 10:05:17,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413805125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:17,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539891030] [2022-07-13 10:05:17,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:05:17,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:17,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:17,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:17,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:05:17,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-13 10:05:17,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 10:05:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:17,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-07-13 10:05:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:18,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 31 [2022-07-13 10:05:18,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:18,200 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:05:18,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 34 [2022-07-13 10:05:18,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:18,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-07-13 10:05:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:18,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-07-13 10:05:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:18,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-13 10:05:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 186 proven. 154 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-13 10:05:18,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:18,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539891030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:18,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:05:18,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 37 [2022-07-13 10:05:18,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793778599] [2022-07-13 10:05:18,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 10:05:18,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 10:05:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 10:05:18,891 INFO L87 Difference]: Start difference. First operand 2400 states and 4213 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:05:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:20,802 INFO L93 Difference]: Finished difference Result 4976 states and 8857 transitions. [2022-07-13 10:05:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-13 10:05:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 91 [2022-07-13 10:05:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:20,833 INFO L225 Difference]: With dead ends: 4976 [2022-07-13 10:05:20,834 INFO L226 Difference]: Without dead ends: 2887 [2022-07-13 10:05:20,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=564, Invalid=4692, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 10:05:20,854 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:20,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 415 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 628 Invalid, 0 Unknown, 725 Unchecked, 0.4s Time] [2022-07-13 10:05:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-13 10:05:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2831. [2022-07-13 10:05:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2671 states have (on average 1.355672032946462) internal successors, (3621), 2725 states have internal predecessors, (3621), 68 states have call successors, (68), 37 states have call predecessors, (68), 91 states have return successors, (1244), 68 states have call predecessors, (1244), 68 states have call successors, (1244) [2022-07-13 10:05:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 4933 transitions. [2022-07-13 10:05:21,384 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 4933 transitions. Word has length 91 [2022-07-13 10:05:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:21,385 INFO L495 AbstractCegarLoop]: Abstraction has 2831 states and 4933 transitions. [2022-07-13 10:05:21,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:05:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 4933 transitions. [2022-07-13 10:05:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:05:21,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:21,415 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:21,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:21,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 10:05:21,632 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1790257655, now seen corresponding path program 6 times [2022-07-13 10:05:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:21,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259871750] [2022-07-13 10:05:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:21,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:05:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:05:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:22,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:05:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-13 10:05:22,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:22,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259871750] [2022-07-13 10:05:22,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259871750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:22,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397523261] [2022-07-13 10:05:22,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:05:22,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:22,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:22,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:22,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:05:22,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-13 10:05:22,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:22,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 10:05:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:22,350 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 [2022-07-13 10:05:22,578 INFO L356 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2022-07-13 10:05:22,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 37 [2022-07-13 10:05:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 248 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 10:05:26,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 293 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-13 10:05:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397523261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:05:27,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:05:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 13] total 40 [2022-07-13 10:05:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503116504] [2022-07-13 10:05:27,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 10:05:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 10:05:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1366, Unknown=2, NotChecked=0, Total=1560 [2022-07-13 10:05:27,605 INFO L87 Difference]: Start difference. First operand 2831 states and 4933 transitions. Second operand has 40 states, 40 states have (on average 2.6) internal successors, (104), 39 states have internal predecessors, (104), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 10:06:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:06:07,252 INFO L93 Difference]: Finished difference Result 4958 states and 8207 transitions. [2022-07-13 10:06:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 10:06:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 39 states have internal predecessors, (104), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 91 [2022-07-13 10:06:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:06:07,280 INFO L225 Difference]: With dead ends: 4958 [2022-07-13 10:06:07,280 INFO L226 Difference]: Without dead ends: 3443 [2022-07-13 10:06:07,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=1239, Invalid=6750, Unknown=21, NotChecked=0, Total=8010 [2022-07-13 10:06:07,291 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:06:07,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 252 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1040 Invalid, 0 Unknown, 449 Unchecked, 0.5s Time] [2022-07-13 10:06:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2022-07-13 10:06:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 3138. [2022-07-13 10:06:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 2961 states have (on average 1.3438027693346841) internal successors, (3979), 3026 states have internal predecessors, (3979), 72 states have call successors, (72), 39 states have call predecessors, (72), 104 states have return successors, (1301), 72 states have call predecessors, (1301), 72 states have call successors, (1301) [2022-07-13 10:06:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 5352 transitions. [2022-07-13 10:06:07,821 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 5352 transitions. Word has length 91 [2022-07-13 10:06:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:06:07,821 INFO L495 AbstractCegarLoop]: Abstraction has 3138 states and 5352 transitions. [2022-07-13 10:06:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 39 states have internal predecessors, (104), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 10:06:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 5352 transitions. [2022-07-13 10:06:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:06:07,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:06:07,856 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:06:07,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:06:08,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 10:06:08,080 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:06:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:06:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash 31675077, now seen corresponding path program 7 times [2022-07-13 10:06:08,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:06:08,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723371756] [2022-07-13 10:06:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:06:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:06:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:06:08,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:06:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:06:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:06:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:06:08,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:06:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:06:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 10:06:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:06:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723371756] [2022-07-13 10:06:08,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723371756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:06:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898676276] [2022-07-13 10:06:08,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:06:08,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:06:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:06:08,644 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:06:08,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:06:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:06:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 10:06:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:06:08,966 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:06:08,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-13 10:06:09,008 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:06:09,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-13 10:06:09,050 INFO L356 Elim1Store]: treesize reduction 93, result has 12.3 percent of original size [2022-07-13 10:06:09,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 35 [2022-07-13 10:06:09,132 INFO L356 Elim1Store]: treesize reduction 66, result has 27.5 percent of original size [2022-07-13 10:06:09,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2022-07-13 10:06:09,173 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:06:09,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2022-07-13 10:06:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 187 proven. 180 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 10:06:19,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:07:34,268 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_653 Int) (|v_ULTIMATE.start_main_~i~2#1_59| Int)) (or (let ((.cse0 (+ (select (store (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse2 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset| 4)))) (+ (* |v_ULTIMATE.start_main_~i~2#1_59| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_653) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1))) (<= .cse0 (* 2 (div .cse0 2)))) (not (<= (+ |c_ULTIMATE.start_main_~i~2#1| 1) |v_ULTIMATE.start_main_~i~2#1_59|)))) is different from false [2022-07-13 10:07:34,864 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_653 Int) (|v_ULTIMATE.start_main_~i~2#1_59| Int)) (or (let ((.cse0 (+ (select (store (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse2 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset| 4) (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset| 8)))) (+ (* |v_ULTIMATE.start_main_~i~2#1_59| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_653) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1))) (<= .cse0 (* 2 (div .cse0 2)))) (not (<= (+ 2 |c_ULTIMATE.start_main_~i~2#1|) |v_ULTIMATE.start_main_~i~2#1_59|)))) is different from false [2022-07-13 10:08:02,751 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-13 10:08:02,752 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 37 treesize of output 30 [2022-07-13 10:08:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 200 proven. 136 refuted. 1 times theorem prover too weak. 72 trivial. 7 not checked. [2022-07-13 10:08:02,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898676276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:02,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:02,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 22] total 54 [2022-07-13 10:08:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358936338] [2022-07-13 10:08:02,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-13 10:08:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-13 10:08:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2389, Unknown=74, NotChecked=202, Total=2862 [2022-07-13 10:08:02,903 INFO L87 Difference]: Start difference. First operand 3138 states and 5352 transitions. Second operand has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 52 states have internal predecessors, (132), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7)