./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-simple/deep-nested.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:36:26,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:36:26,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:36:26,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:36:26,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:36:26,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:36:26,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:36:26,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:36:26,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:36:26,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:36:26,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:36:26,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:36:26,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:36:26,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:36:26,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:36:26,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:36:26,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:36:26,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:36:26,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:36:26,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:36:26,069 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:36:26,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:36:26,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:36:26,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:36:26,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:36:26,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:36:26,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:36:26,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:36:26,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:36:26,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:36:26,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:36:26,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:36:26,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:36:26,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:36:26,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:36:26,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:36:26,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:36:26,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:36:26,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:36:26,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:36:26,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:36:26,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:36:26,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:36:26,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:36:26,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:36:26,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:36:26,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:36:26,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:36:26,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:36:26,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:36:26,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:36:26,105 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:36:26,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:36:26,106 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:36:26,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:36:26,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:36:26,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:36:26,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:36:26,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:36:26,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:36:26,107 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:36:26,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:36:26,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:36:26,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:36:26,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:36:26,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:36:26,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:36:26,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:36:26,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:36:26,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:36:26,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:36:26,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:36:26,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:36:26,110 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:36:26,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:36:26,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:36:26,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2022-07-22 15:36:26,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:36:26,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:36:26,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:36:26,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:36:26,307 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:36:26,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/deep-nested.c [2022-07-22 15:36:26,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b885c7e8a/b3af035fbab64feaa9dff553b23e67d1/FLAGddce6555f [2022-07-22 15:36:26,716 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:36:26,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2022-07-22 15:36:26,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b885c7e8a/b3af035fbab64feaa9dff553b23e67d1/FLAGddce6555f [2022-07-22 15:36:26,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b885c7e8a/b3af035fbab64feaa9dff553b23e67d1 [2022-07-22 15:36:26,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:36:26,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:36:26,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:36:26,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:36:26,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:36:26,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5438d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26, skipping insertion in model container [2022-07-22 15:36:26,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:36:26,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:36:26,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-07-22 15:36:26,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:36:26,905 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:36:26,923 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-07-22 15:36:26,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:36:26,937 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:36:26,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26 WrapperNode [2022-07-22 15:36:26,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:36:26,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:36:26,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:36:26,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:36:26,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,965 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-07-22 15:36:26,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:36:26,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:36:26,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:36:26,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:36:26,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:26,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:36:26,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:36:26,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:36:26,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:36:26,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (1/1) ... [2022-07-22 15:36:27,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:36:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:27,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 15:36:27,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 15:36:27,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:36:27,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:36:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:36:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:36:27,101 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:36:27,102 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:36:27,183 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:36:27,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:36:27,187 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-22 15:36:27,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:36:27 BoogieIcfgContainer [2022-07-22 15:36:27,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:36:27,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:36:27,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:36:27,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:36:27,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:36:26" (1/3) ... [2022-07-22 15:36:27,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5a2c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:36:27, skipping insertion in model container [2022-07-22 15:36:27,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:26" (2/3) ... [2022-07-22 15:36:27,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5a2c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:36:27, skipping insertion in model container [2022-07-22 15:36:27,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:36:27" (3/3) ... [2022-07-22 15:36:27,222 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-07-22 15:36:27,232 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:36:27,232 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:36:27,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:36:27,268 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@788d960, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@28dfc7df [2022-07-22 15:36:27,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:36:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 15:36:27,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:27,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:27,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash -180366952, now seen corresponding path program 1 times [2022-07-22 15:36:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:27,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360514002] [2022-07-22 15:36:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:27,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:27,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360514002] [2022-07-22 15:36:27,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360514002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:27,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:36:27,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 15:36:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204558679] [2022-07-22 15:36:27,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:36:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:36:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:36:27,606 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:27,678 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2022-07-22 15:36:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:36:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 15:36:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:27,686 INFO L225 Difference]: With dead ends: 39 [2022-07-22 15:36:27,686 INFO L226 Difference]: Without dead ends: 18 [2022-07-22 15:36:27,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:36:27,693 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:27,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-22 15:36:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-22 15:36:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-07-22 15:36:27,714 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-07-22 15:36:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:27,714 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-07-22 15:36:27,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-07-22 15:36:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 15:36:27,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:27,715 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:36:27,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash -303894894, now seen corresponding path program 1 times [2022-07-22 15:36:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802037033] [2022-07-22 15:36:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:36:27,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:27,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802037033] [2022-07-22 15:36:27,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802037033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:27,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:36:27,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:36:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985388121] [2022-07-22 15:36:27,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:27,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:36:27,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:27,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:36:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:36:27,907 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:27,955 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-07-22 15:36:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:36:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 15:36:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:27,957 INFO L225 Difference]: With dead ends: 32 [2022-07-22 15:36:27,957 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 15:36:27,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:36:27,959 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:27,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 15:36:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-22 15:36:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-07-22 15:36:27,968 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2022-07-22 15:36:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:27,968 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-07-22 15:36:27,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-07-22 15:36:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 15:36:27,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:27,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:36:27,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1056396073, now seen corresponding path program 1 times [2022-07-22 15:36:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:27,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59676764] [2022-07-22 15:36:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:27,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:36:28,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:28,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59676764] [2022-07-22 15:36:28,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59676764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:28,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473789784] [2022-07-22 15:36:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:28,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:28,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:28,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:28,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:36:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:36:28,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:36:28,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:36:28,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473789784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:28,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:36:28,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-22 15:36:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350569300] [2022-07-22 15:36:28,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:28,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:36:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:36:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:36:28,202 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:28,266 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-07-22 15:36:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:36:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 15:36:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:28,267 INFO L225 Difference]: With dead ends: 67 [2022-07-22 15:36:28,267 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 15:36:28,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:36:28,268 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:28,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 15:36:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-07-22 15:36:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-22 15:36:28,280 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-07-22 15:36:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:28,281 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-22 15:36:28,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-22 15:36:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 15:36:28,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:28,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:28,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 15:36:28,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:28,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1212980556, now seen corresponding path program 1 times [2022-07-22 15:36:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922404009] [2022-07-22 15:36:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:36:28,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:28,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922404009] [2022-07-22 15:36:28,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922404009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:28,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700547489] [2022-07-22 15:36:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:28,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:28,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:28,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:36:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:36:28,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:36:28,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:36:28,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700547489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:28,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:36:28,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-07-22 15:36:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207665923] [2022-07-22 15:36:28,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:36:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:36:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:36:28,702 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:28,756 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-07-22 15:36:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:36:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-22 15:36:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:28,757 INFO L225 Difference]: With dead ends: 76 [2022-07-22 15:36:28,757 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 15:36:28,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:36:28,765 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:28,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 16 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 15:36:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2022-07-22 15:36:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-07-22 15:36:28,781 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2022-07-22 15:36:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:28,781 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-07-22 15:36:28,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-07-22 15:36:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 15:36:28,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:28,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:28,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 15:36:28,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 15:36:28,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1901462963, now seen corresponding path program 1 times [2022-07-22 15:36:28,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:28,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348608563] [2022-07-22 15:36:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:28,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:36:29,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348608563] [2022-07-22 15:36:29,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348608563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:29,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761122918] [2022-07-22 15:36:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:29,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:29,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:29,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:36:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:36:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:36:29,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:36:29,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761122918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:29,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:36:29,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-07-22 15:36:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678564336] [2022-07-22 15:36:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:29,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:36:29,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:29,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:36:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:36:29,169 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:29,232 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-07-22 15:36:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:36:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 15:36:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:29,234 INFO L225 Difference]: With dead ends: 76 [2022-07-22 15:36:29,234 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 15:36:29,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:36:29,236 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:29,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 15:36:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-07-22 15:36:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-22 15:36:29,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 21 [2022-07-22 15:36:29,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:29,254 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-22 15:36:29,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-22 15:36:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 15:36:29,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:29,255 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:29,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 15:36:29,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:29,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:29,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1208008852, now seen corresponding path program 1 times [2022-07-22 15:36:29,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:29,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652282613] [2022-07-22 15:36:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:29,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:36:29,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:29,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652282613] [2022-07-22 15:36:29,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652282613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:29,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956119755] [2022-07-22 15:36:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:29,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:29,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:29,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:29,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:36:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:29,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 15:36:29,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 15:36:29,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 15:36:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956119755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:29,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:29,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-07-22 15:36:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172296564] [2022-07-22 15:36:29,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 15:36:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 15:36:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:36:29,903 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:31,314 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2022-07-22 15:36:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 15:36:31,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 15:36:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:31,315 INFO L225 Difference]: With dead ends: 186 [2022-07-22 15:36:31,315 INFO L226 Difference]: Without dead ends: 111 [2022-07-22 15:36:31,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 15:36:31,317 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 530 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:31,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 64 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-22 15:36:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2022-07-22 15:36:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-07-22 15:36:31,328 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 27 [2022-07-22 15:36:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:31,329 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-07-22 15:36:31,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-07-22 15:36:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 15:36:31,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:31,330 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:31,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:31,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:31,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:31,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash -971666175, now seen corresponding path program 2 times [2022-07-22 15:36:31,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:31,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64343128] [2022-07-22 15:36:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:31,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 15:36:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64343128] [2022-07-22 15:36:31,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64343128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344078424] [2022-07-22 15:36:31,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:31,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:31,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:31,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:36:31,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 15:36:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:36:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-22 15:36:31,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:36:31,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344078424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:31,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:36:31,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-07-22 15:36:31,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357175195] [2022-07-22 15:36:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:31,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:36:31,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:36:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:36:31,867 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:31,895 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-07-22 15:36:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:36:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-22 15:36:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:31,899 INFO L225 Difference]: With dead ends: 73 [2022-07-22 15:36:31,899 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 15:36:31,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:36:31,900 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:31,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 15:36:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-07-22 15:36:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-22 15:36:31,910 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 48 [2022-07-22 15:36:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:31,910 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-22 15:36:31,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-22 15:36:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 15:36:31,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:31,911 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:31,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:32,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:32,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -414140084, now seen corresponding path program 3 times [2022-07-22 15:36:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:32,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359752419] [2022-07-22 15:36:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:32,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 15:36:32,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:32,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359752419] [2022-07-22 15:36:32,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359752419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:32,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154533674] [2022-07-22 15:36:32,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:36:32,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:32,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:32,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:32,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:36:32,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-22 15:36:32,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 15:36:32,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-22 15:36:32,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:36:32,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154533674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:32,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:36:32,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-07-22 15:36:32,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877884359] [2022-07-22 15:36:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:36:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:36:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:36:32,406 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:32,436 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2022-07-22 15:36:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:36:32,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 15:36:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:32,437 INFO L225 Difference]: With dead ends: 117 [2022-07-22 15:36:32,437 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 15:36:32,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:36:32,438 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:32,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 15:36:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2022-07-22 15:36:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-07-22 15:36:32,453 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 63 [2022-07-22 15:36:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:32,453 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-07-22 15:36:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-07-22 15:36:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 15:36:32,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:32,454 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:32,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:32,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:32,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:32,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1648728410, now seen corresponding path program 4 times [2022-07-22 15:36:32,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:32,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211876451] [2022-07-22 15:36:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:32,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 15:36:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:32,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211876451] [2022-07-22 15:36:32,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211876451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:32,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72532881] [2022-07-22 15:36:32,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:36:32,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:32,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:32,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:32,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:36:32,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:36:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:36:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 88 proven. 71 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 15:36:33,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 30 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 15:36:33,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72532881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:33,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:33,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-07-22 15:36:33,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24155246] [2022-07-22 15:36:33,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:33,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 15:36:33,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:33,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 15:36:33,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:36:33,202 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:33,579 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2022-07-22 15:36:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:36:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 15:36:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:33,580 INFO L225 Difference]: With dead ends: 251 [2022-07-22 15:36:33,580 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 15:36:33,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:36:33,581 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 121 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:33,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 75 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 15:36:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2022-07-22 15:36:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-07-22 15:36:33,595 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 75 [2022-07-22 15:36:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:33,595 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-07-22 15:36:33,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-07-22 15:36:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 15:36:33,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:33,596 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:33,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:33,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:33,812 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1372721946, now seen corresponding path program 5 times [2022-07-22 15:36:33,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:33,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970571658] [2022-07-22 15:36:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:33,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 20 proven. 270 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2022-07-22 15:36:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970571658] [2022-07-22 15:36:34,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970571658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014127396] [2022-07-22 15:36:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:36:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:34,010 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:34,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:36:34,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-22 15:36:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 15:36:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 438 proven. 84 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-22 15:36:34,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 420 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-22 15:36:34,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014127396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:34,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:34,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-07-22 15:36:34,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219950513] [2022-07-22 15:36:34,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:34,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 15:36:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 15:36:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:36:34,683 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:35,709 INFO L93 Difference]: Finished difference Result 514 states and 609 transitions. [2022-07-22 15:36:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 15:36:35,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-07-22 15:36:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:35,710 INFO L225 Difference]: With dead ends: 514 [2022-07-22 15:36:35,710 INFO L226 Difference]: Without dead ends: 330 [2022-07-22 15:36:35,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 15:36:35,712 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 282 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:35,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 65 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-22 15:36:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 231. [2022-07-22 15:36:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1) internal successors, (253), 230 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 253 transitions. [2022-07-22 15:36:35,734 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 253 transitions. Word has length 105 [2022-07-22 15:36:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:35,736 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 253 transitions. [2022-07-22 15:36:35,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 253 transitions. [2022-07-22 15:36:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-07-22 15:36:35,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:35,738 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:35,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:36:35,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1843530466, now seen corresponding path program 6 times [2022-07-22 15:36:35,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:35,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849281835] [2022-07-22 15:36:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:35,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-07-22 15:36:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849281835] [2022-07-22 15:36:36,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849281835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647239248] [2022-07-22 15:36:36,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:36:36,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:36,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:36,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 15:36:36,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 15:36:36,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:36:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 2703 proven. 540 refuted. 0 times theorem prover too weak. 2125 trivial. 0 not checked. [2022-07-22 15:36:36,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 2125 trivial. 0 not checked. [2022-07-22 15:36:36,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647239248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:36,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:36,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-07-22 15:36:36,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302842924] [2022-07-22 15:36:36,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:36,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 15:36:36,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 15:36:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:36:37,000 INFO L87 Difference]: Start difference. First operand 231 states and 253 transitions. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:38,339 INFO L93 Difference]: Finished difference Result 1439 states and 1642 transitions. [2022-07-22 15:36:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 15:36:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2022-07-22 15:36:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:38,343 INFO L225 Difference]: With dead ends: 1439 [2022-07-22 15:36:38,343 INFO L226 Difference]: Without dead ends: 1213 [2022-07-22 15:36:38,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 15:36:38,344 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:38,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 49 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-22 15:36:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 603. [2022-07-22 15:36:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.0714285714285714) internal successors, (645), 602 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 645 transitions. [2022-07-22 15:36:38,399 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 645 transitions. Word has length 228 [2022-07-22 15:36:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:38,399 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 645 transitions. [2022-07-22 15:36:38,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 645 transitions. [2022-07-22 15:36:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2022-07-22 15:36:38,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:38,405 INFO L195 NwaCegarLoop]: trace histogram [162, 161, 161, 23, 22, 22, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:38,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:38,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:38,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:38,622 INFO L85 PathProgramCache]: Analyzing trace with hash 265720766, now seen corresponding path program 7 times [2022-07-22 15:36:38,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:38,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495296848] [2022-07-22 15:36:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:38,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 43666 backedges. 50 proven. 3795 refuted. 0 times theorem prover too weak. 39821 trivial. 0 not checked. [2022-07-22 15:36:39,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:39,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495296848] [2022-07-22 15:36:39,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495296848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:39,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121414440] [2022-07-22 15:36:39,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:36:39,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:39,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:39,642 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:39,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 15:36:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:36:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 43666 backedges. 6966 proven. 206 refuted. 0 times theorem prover too weak. 36494 trivial. 0 not checked. [2022-07-22 15:36:40,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 43666 backedges. 6966 proven. 206 refuted. 0 times theorem prover too weak. 36494 trivial. 0 not checked. [2022-07-22 15:36:40,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121414440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:40,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:40,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-07-22 15:36:40,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975333247] [2022-07-22 15:36:40,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:40,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 15:36:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 15:36:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-07-22 15:36:40,261 INFO L87 Difference]: Start difference. First operand 603 states and 645 transitions. Second operand has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:46,622 INFO L93 Difference]: Finished difference Result 2937 states and 3339 transitions. [2022-07-22 15:36:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-22 15:36:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 600 [2022-07-22 15:36:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:46,627 INFO L225 Difference]: With dead ends: 2937 [2022-07-22 15:36:46,627 INFO L226 Difference]: Without dead ends: 2362 [2022-07-22 15:36:46,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1287 GetRequests, 1187 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1583, Invalid=8719, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 15:36:46,631 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 649 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 61 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 15:36:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-07-22 15:36:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2132. [2022-07-22 15:36:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 1.040356640075082) internal successors, (2217), 2131 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2217 transitions. [2022-07-22 15:36:46,840 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2217 transitions. Word has length 600 [2022-07-22 15:36:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:46,840 INFO L495 AbstractCegarLoop]: Abstraction has 2132 states and 2217 transitions. [2022-07-22 15:36:46,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2217 transitions. [2022-07-22 15:36:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2128 [2022-07-22 15:36:46,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:46,938 INFO L195 NwaCegarLoop]: trace histogram [628, 627, 627, 66, 65, 65, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:46,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 15:36:47,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash 306642997, now seen corresponding path program 8 times [2022-07-22 15:36:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:47,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704780925] [2022-07-22 15:36:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 637987 backedges. 93 proven. 20614 refuted. 0 times theorem prover too weak. 617280 trivial. 0 not checked. [2022-07-22 15:36:51,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:51,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704780925] [2022-07-22 15:36:51,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704780925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067235176] [2022-07-22 15:36:51,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:51,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:51,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:51,957 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) [2022-07-22 15:36:51,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 15:36:52,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:36:52,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 3035 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:36:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 637987 backedges. 190084 proven. 10961 refuted. 0 times theorem prover too weak. 436942 trivial. 0 not checked. [2022-07-22 15:36:53,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 637987 backedges. 190078 proven. 10967 refuted. 0 times theorem prover too weak. 436942 trivial. 0 not checked. [2022-07-22 15:36:54,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067235176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:54,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:54,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-07-22 15:36:54,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109977030] [2022-07-22 15:36:54,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 15:36:54,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 15:36:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:36:54,207 INFO L87 Difference]: Start difference. First operand 2132 states and 2217 transitions. Second operand has 30 states, 30 states have (on average 4.3) internal successors, (129), 30 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:03,674 INFO L93 Difference]: Finished difference Result 8560 states and 9365 transitions. [2022-07-22 15:37:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-22 15:37:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.3) internal successors, (129), 30 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2127 [2022-07-22 15:37:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:03,692 INFO L225 Difference]: With dead ends: 8560 [2022-07-22 15:37:03,692 INFO L226 Difference]: Without dead ends: 6465 [2022-07-22 15:37:03,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4362 GetRequests, 4241 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2057, Invalid=12949, Unknown=0, NotChecked=0, Total=15006 [2022-07-22 15:37:03,700 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 842 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:03,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 142 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 15:37:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2022-07-22 15:37:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 5926. [2022-07-22 15:37:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.029535864978903) internal successors, (6100), 5925 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6100 transitions. [2022-07-22 15:37:04,356 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6100 transitions. Word has length 2127 [2022-07-22 15:37:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:04,356 INFO L495 AbstractCegarLoop]: Abstraction has 5926 states and 6100 transitions. [2022-07-22 15:37:04,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.3) internal successors, (129), 30 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6100 transitions. [2022-07-22 15:37:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5920 [2022-07-22 15:37:04,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:04,519 INFO L195 NwaCegarLoop]: trace histogram [1801, 1800, 1800, 144, 143, 143, 24, 23, 23, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:04,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:37:04,719 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,SelfDestructingSolverStorable12 [2022-07-22 15:37:04,719 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1135179596, now seen corresponding path program 9 times [2022-07-22 15:37:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:04,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718340263] [2022-07-22 15:37:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5153228 backedges. 197 proven. 75529 refuted. 0 times theorem prover too weak. 5077502 trivial. 0 not checked. [2022-07-22 15:37:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718340263] [2022-07-22 15:37:35,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718340263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94872844] [2022-07-22 15:37:35,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:37:35,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:35,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:35,352 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) [2022-07-22 15:37:35,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 15:37:35,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 15:37:35,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:35,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 15:37:35,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5153228 backedges. 2578090 proven. 644701 refuted. 0 times theorem prover too weak. 1930437 trivial. 0 not checked. [2022-07-22 15:37:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5153228 backedges. 0 proven. 3222791 refuted. 0 times theorem prover too weak. 1930437 trivial. 0 not checked. [2022-07-22 15:38:06,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94872844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:06,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:06,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 25 [2022-07-22 15:38:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571999818] [2022-07-22 15:38:06,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:06,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 15:38:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 15:38:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-07-22 15:38:06,338 INFO L87 Difference]: Start difference. First operand 5926 states and 6100 transitions. Second operand has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:11,599 INFO L93 Difference]: Finished difference Result 24097 states and 25621 transitions. [2022-07-22 15:38:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 15:38:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5919 [2022-07-22 15:38:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:11,646 INFO L225 Difference]: With dead ends: 24097 [2022-07-22 15:38:11,646 INFO L226 Difference]: Without dead ends: 18217 [2022-07-22 15:38:11,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11934 GetRequests, 11833 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3193 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1513, Invalid=8993, Unknown=0, NotChecked=0, Total=10506 [2022-07-22 15:38:11,662 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 504 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:11,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 61 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 15:38:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18217 states. [2022-07-22 15:38:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18217 to 12251. [2022-07-22 15:38:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12251 states, 12250 states have (on average 1.0249795918367346) internal successors, (12556), 12250 states have internal predecessors, (12556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12251 states to 12251 states and 12556 transitions. [2022-07-22 15:38:13,100 INFO L78 Accepts]: Start accepts. Automaton has 12251 states and 12556 transitions. Word has length 5919 [2022-07-22 15:38:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:13,101 INFO L495 AbstractCegarLoop]: Abstraction has 12251 states and 12556 transitions. [2022-07-22 15:38:13,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12251 states and 12556 transitions. [2022-07-22 15:38:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12247 [2022-07-22 15:38:13,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:13,777 INFO L195 NwaCegarLoop]: trace histogram [3781, 3780, 3780, 252, 251, 251, 42, 41, 41, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:13,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 15:38:13,977 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,SelfDestructingSolverStorable13 [2022-07-22 15:38:13,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:13,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2136943533, now seen corresponding path program 10 times [2022-07-22 15:38:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:13,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688529422] [2022-07-22 15:38:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:13,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:40:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat