./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.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 904bd1313458c4f9af8d5bf1208ba922a2079eb77883d7ecd1ca28ceda09c9f6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:21:12,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:21:12,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:21:12,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:21:12,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:21:12,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:21:13,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:21:13,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:21:13,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:21:13,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:21:13,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:21:13,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:21:13,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:21:13,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:21:13,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:21:13,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:21:13,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:21:13,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:21:13,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:21:13,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:21:13,040 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:21:13,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:21:13,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:21:13,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:21:13,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:21:13,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:21:13,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:21:13,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:21:13,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:21:13,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:21:13,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:21:13,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:21:13,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:21:13,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:21:13,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:21:13,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:21:13,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:21:13,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:21:13,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:21:13,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:21:13,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:21:13,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:21:13,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:21:13,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:21:13,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:21:13,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:21:13,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:21:13,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:21:13,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:21:13,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:21:13,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:21:13,113 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:21:13,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:21:13,114 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:21:13,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:21:13,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:21:13,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:21:13,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:21:13,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:21:13,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:21:13,115 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:21:13,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:21:13,116 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:21:13,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:21:13,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:21:13,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:21:13,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:21:13,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:21:13,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:21:13,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:21:13,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:21:13,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:21:13,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:21:13,117 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:21:13,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:21:13,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:21:13,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 904bd1313458c4f9af8d5bf1208ba922a2079eb77883d7ecd1ca28ceda09c9f6 [2022-07-13 18:21:13,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:21:13,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:21:13,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:21:13,500 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:21:13,501 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:21:13,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2022-07-13 18:21:13,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c0aef28/10adfda41d0244dea992a1346a40cfd3/FLAG6982501eb [2022-07-13 18:21:14,188 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:21:14,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2022-07-13 18:21:14,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c0aef28/10adfda41d0244dea992a1346a40cfd3/FLAG6982501eb [2022-07-13 18:21:14,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c0aef28/10adfda41d0244dea992a1346a40cfd3 [2022-07-13 18:21:14,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:21:14,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:21:14,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:21:14,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:21:14,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:21:14,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:14" (1/1) ... [2022-07-13 18:21:14,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3572d0d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:14, skipping insertion in model container [2022-07-13 18:21:14,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:14" (1/1) ... [2022-07-13 18:21:14,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:21:14,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:21:14,973 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/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c[12764,12777] [2022-07-13 18:21:14,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:21:14,995 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:21:15,103 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/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c[12764,12777] [2022-07-13 18:21:15,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:21:15,113 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:21:15,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15 WrapperNode [2022-07-13 18:21:15,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:21:15,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:21:15,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:21:15,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:21:15,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,202 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 441 [2022-07-13 18:21:15,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:21:15,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:21:15,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:21:15,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:21:15,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:21:15,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:21:15,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:21:15,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:21:15,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (1/1) ... [2022-07-13 18:21:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:21:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:21:15,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 18:21:15,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 18:21:15,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:21:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:21:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:21:15,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:21:15,557 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:21:15,570 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:21:16,274 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:21:16,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:21:16,280 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 18:21:16,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:16 BoogieIcfgContainer [2022-07-13 18:21:16,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:21:16,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:21:16,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:21:16,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:21:16,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:21:14" (1/3) ... [2022-07-13 18:21:16,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ad72bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:16, skipping insertion in model container [2022-07-13 18:21:16,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:15" (2/3) ... [2022-07-13 18:21:16,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ad72bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:16, skipping insertion in model container [2022-07-13 18:21:16,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:16" (3/3) ... [2022-07-13 18:21:16,303 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2022-07-13 18:21:16,313 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:21:16,327 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:21:16,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:21:16,442 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@721d8a32, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c93f011 [2022-07-13 18:21:16,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:21:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 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) [2022-07-13 18:21:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 18:21:16,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:16,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:16,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2022-07-13 18:21:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062271674] [2022-07-13 18:21:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:16,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:16,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062271674] [2022-07-13 18:21:16,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062271674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:16,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:16,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 18:21:16,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341875783] [2022-07-13 18:21:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:16,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 18:21:16,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 18:21:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:21:16,892 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-07-13 18:21:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:16,952 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2022-07-13 18:21:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 18:21:16,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2022-07-13 18:21:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:16,978 INFO L225 Difference]: With dead ends: 206 [2022-07-13 18:21:16,979 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 18:21:16,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:21:16,985 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:16,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 18:21:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-13 18:21:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.746031746031746) internal successors, (220), 126 states have internal predecessors, (220), 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) [2022-07-13 18:21:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2022-07-13 18:21:17,055 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2022-07-13 18:21:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:17,056 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2022-07-13 18:21:17,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-07-13 18:21:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2022-07-13 18:21:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 18:21:17,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:17,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:17,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:21:17,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2022-07-13 18:21:17,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:17,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626975219] [2022-07-13 18:21:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:17,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:17,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626975219] [2022-07-13 18:21:17,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626975219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:17,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:17,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528186146] [2022-07-13 18:21:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:17,201 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2022-07-13 18:21:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:17,280 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2022-07-13 18:21:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:21:17,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2022-07-13 18:21:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:17,284 INFO L225 Difference]: With dead ends: 271 [2022-07-13 18:21:17,285 INFO L226 Difference]: Without dead ends: 197 [2022-07-13 18:21:17,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:21:17,289 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 120 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:17,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 832 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-13 18:21:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2022-07-13 18:21:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5317460317460319) internal successors, (193), 126 states have internal predecessors, (193), 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) [2022-07-13 18:21:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2022-07-13 18:21:17,305 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2022-07-13 18:21:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:17,306 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2022-07-13 18:21:17,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2022-07-13 18:21:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2022-07-13 18:21:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:21:17,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:17,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:17,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:21:17,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2022-07-13 18:21:17,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012945052] [2022-07-13 18:21:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:17,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:17,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:17,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012945052] [2022-07-13 18:21:17,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012945052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:17,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:17,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:21:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11213009] [2022-07-13 18:21:17,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:21:17,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:21:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,393 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-07-13 18:21:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:17,422 INFO L93 Difference]: Finished difference Result 252 states and 402 transitions. [2022-07-13 18:21:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:21:17,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 [2022-07-13 18:21:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:17,424 INFO L225 Difference]: With dead ends: 252 [2022-07-13 18:21:17,424 INFO L226 Difference]: Without dead ends: 182 [2022-07-13 18:21:17,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,429 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 93 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:17,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 411 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-13 18:21:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-07-13 18:21:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.553072625698324) internal successors, (278), 179 states have internal predecessors, (278), 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) [2022-07-13 18:21:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 278 transitions. [2022-07-13 18:21:17,446 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 278 transitions. Word has length 63 [2022-07-13 18:21:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:17,447 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 278 transitions. [2022-07-13 18:21:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-07-13 18:21:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 278 transitions. [2022-07-13 18:21:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 18:21:17,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:17,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:17,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:21:17,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2022-07-13 18:21:17,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:17,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455739328] [2022-07-13 18:21:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:17,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:17,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455739328] [2022-07-13 18:21:17,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455739328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:17,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:17,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:21:17,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160045510] [2022-07-13 18:21:17,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:17,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:21:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:17,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:21:17,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,519 INFO L87 Difference]: Start difference. First operand 180 states and 278 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-13 18:21:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:17,538 INFO L93 Difference]: Finished difference Result 360 states and 576 transitions. [2022-07-13 18:21:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:21:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-07-13 18:21:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:17,541 INFO L225 Difference]: With dead ends: 360 [2022-07-13 18:21:17,541 INFO L226 Difference]: Without dead ends: 237 [2022-07-13 18:21:17,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,548 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 102 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:17,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 441 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-13 18:21:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2022-07-13 18:21:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5811965811965811) internal successors, (370), 234 states have internal predecessors, (370), 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) [2022-07-13 18:21:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 370 transitions. [2022-07-13 18:21:17,559 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 370 transitions. Word has length 65 [2022-07-13 18:21:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:17,559 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 370 transitions. [2022-07-13 18:21:17,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-13 18:21:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 370 transitions. [2022-07-13 18:21:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 18:21:17,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:17,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:17,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:21:17,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2022-07-13 18:21:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:17,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567611237] [2022-07-13 18:21:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:17,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:17,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:17,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567611237] [2022-07-13 18:21:17,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567611237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:17,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:17,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:21:17,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019972062] [2022-07-13 18:21:17,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:17,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:21:17,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:21:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,640 INFO L87 Difference]: Start difference. First operand 235 states and 370 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-13 18:21:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:17,657 INFO L93 Difference]: Finished difference Result 566 states and 917 transitions. [2022-07-13 18:21:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:21:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-07-13 18:21:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:17,660 INFO L225 Difference]: With dead ends: 566 [2022-07-13 18:21:17,660 INFO L226 Difference]: Without dead ends: 390 [2022-07-13 18:21:17,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,662 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 95 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:17,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 428 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-13 18:21:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-07-13 18:21:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.6020671834625324) internal successors, (620), 387 states have internal predecessors, (620), 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) [2022-07-13 18:21:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 620 transitions. [2022-07-13 18:21:17,678 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 620 transitions. Word has length 65 [2022-07-13 18:21:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:17,680 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 620 transitions. [2022-07-13 18:21:17,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-13 18:21:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 620 transitions. [2022-07-13 18:21:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 18:21:17,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:17,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:17,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:21:17,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2022-07-13 18:21:17,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:17,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953381728] [2022-07-13 18:21:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:17,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953381728] [2022-07-13 18:21:17,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953381728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:17,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:17,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:21:17,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417900283] [2022-07-13 18:21:17,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:17,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:21:17,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:21:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,733 INFO L87 Difference]: Start difference. First operand 388 states and 620 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-07-13 18:21:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:17,753 INFO L93 Difference]: Finished difference Result 705 states and 1143 transitions. [2022-07-13 18:21:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:21:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2022-07-13 18:21:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:17,755 INFO L225 Difference]: With dead ends: 705 [2022-07-13 18:21:17,755 INFO L226 Difference]: Without dead ends: 529 [2022-07-13 18:21:17,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,757 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 96 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:17,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 427 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-07-13 18:21:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2022-07-13 18:21:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.6064638783269962) internal successors, (845), 526 states have internal predecessors, (845), 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) [2022-07-13 18:21:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 845 transitions. [2022-07-13 18:21:17,771 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 845 transitions. Word has length 67 [2022-07-13 18:21:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:17,771 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 845 transitions. [2022-07-13 18:21:17,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-07-13 18:21:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 845 transitions. [2022-07-13 18:21:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 18:21:17,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:17,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:17,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:21:17,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2022-07-13 18:21:17,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33230494] [2022-07-13 18:21:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33230494] [2022-07-13 18:21:17,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33230494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:17,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:17,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:21:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749930786] [2022-07-13 18:21:17,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:17,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:21:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:21:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,836 INFO L87 Difference]: Start difference. First operand 527 states and 845 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-07-13 18:21:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:17,861 INFO L93 Difference]: Finished difference Result 1380 states and 2236 transitions. [2022-07-13 18:21:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:21:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2022-07-13 18:21:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:17,865 INFO L225 Difference]: With dead ends: 1380 [2022-07-13 18:21:17,865 INFO L226 Difference]: Without dead ends: 922 [2022-07-13 18:21:17,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,866 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 89 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:17,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 415 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-07-13 18:21:17,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 920. [2022-07-13 18:21:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 1.601741022850925) internal successors, (1472), 919 states have internal predecessors, (1472), 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) [2022-07-13 18:21:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1472 transitions. [2022-07-13 18:21:17,894 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1472 transitions. Word has length 67 [2022-07-13 18:21:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:17,895 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1472 transitions. [2022-07-13 18:21:17,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-07-13 18:21:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1472 transitions. [2022-07-13 18:21:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 18:21:17,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:17,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:17,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:21:17,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2022-07-13 18:21:17,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:17,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115418181] [2022-07-13 18:21:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:17,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115418181] [2022-07-13 18:21:17,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115418181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:17,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:17,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:21:17,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64740018] [2022-07-13 18:21:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:21:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:21:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,926 INFO L87 Difference]: Start difference. First operand 920 states and 1472 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-07-13 18:21:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:17,953 INFO L93 Difference]: Finished difference Result 1711 states and 2761 transitions. [2022-07-13 18:21:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:21:17,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-07-13 18:21:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:17,957 INFO L225 Difference]: With dead ends: 1711 [2022-07-13 18:21:17,957 INFO L226 Difference]: Without dead ends: 1253 [2022-07-13 18:21:17,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:17,958 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 90 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:17,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 413 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2022-07-13 18:21:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1251. [2022-07-13 18:21:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 1.5968) internal successors, (1996), 1250 states have internal predecessors, (1996), 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) [2022-07-13 18:21:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1996 transitions. [2022-07-13 18:21:18,004 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1996 transitions. Word has length 69 [2022-07-13 18:21:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:18,005 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1996 transitions. [2022-07-13 18:21:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-07-13 18:21:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1996 transitions. [2022-07-13 18:21:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 18:21:18,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:18,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:21:18,012 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:18,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2022-07-13 18:21:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:18,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365147603] [2022-07-13 18:21:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365147603] [2022-07-13 18:21:18,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365147603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:18,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:18,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782262599] [2022-07-13 18:21:18,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:18,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:18,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:18,050 INFO L87 Difference]: Start difference. First operand 1251 states and 1996 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2022-07-13 18:21:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:18,301 INFO L93 Difference]: Finished difference Result 7020 states and 11356 transitions. [2022-07-13 18:21:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:21:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 69 [2022-07-13 18:21:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:18,318 INFO L225 Difference]: With dead ends: 7020 [2022-07-13 18:21:18,318 INFO L226 Difference]: Without dead ends: 5848 [2022-07-13 18:21:18,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:21:18,321 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 774 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:18,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1196 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:21:18,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2022-07-13 18:21:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 2385. [2022-07-13 18:21:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 1.592281879194631) internal successors, (3796), 2384 states have internal predecessors, (3796), 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) [2022-07-13 18:21:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3796 transitions. [2022-07-13 18:21:18,436 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3796 transitions. Word has length 69 [2022-07-13 18:21:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:18,437 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 3796 transitions. [2022-07-13 18:21:18,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2022-07-13 18:21:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3796 transitions. [2022-07-13 18:21:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 18:21:18,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:18,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:18,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:21:18,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2022-07-13 18:21:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:18,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652564601] [2022-07-13 18:21:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:18,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:18,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652564601] [2022-07-13 18:21:18,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652564601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:18,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:18,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:21:18,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639835696] [2022-07-13 18:21:18,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:21:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:21:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:21:18,470 INFO L87 Difference]: Start difference. First operand 2385 states and 3796 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:21:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:19,375 INFO L93 Difference]: Finished difference Result 9047 states and 14463 transitions. [2022-07-13 18:21:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:21:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-13 18:21:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:19,403 INFO L225 Difference]: With dead ends: 9047 [2022-07-13 18:21:19,406 INFO L226 Difference]: Without dead ends: 6741 [2022-07-13 18:21:19,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:19,427 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 338 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:19,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 626 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:21:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6741 states. [2022-07-13 18:21:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6741 to 4544. [2022-07-13 18:21:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 1.5844155844155845) internal successors, (7198), 4543 states have internal predecessors, (7198), 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) [2022-07-13 18:21:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 7198 transitions. [2022-07-13 18:21:19,662 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 7198 transitions. Word has length 70 [2022-07-13 18:21:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:19,662 INFO L495 AbstractCegarLoop]: Abstraction has 4544 states and 7198 transitions. [2022-07-13 18:21:19,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:21:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 7198 transitions. [2022-07-13 18:21:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 18:21:19,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:19,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:19,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:21:19,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:19,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2022-07-13 18:21:19,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:19,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685160874] [2022-07-13 18:21:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:19,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685160874] [2022-07-13 18:21:19,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685160874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:19,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:19,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:21:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111244023] [2022-07-13 18:21:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:19,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:21:19,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:21:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:21:19,707 INFO L87 Difference]: Start difference. First operand 4544 states and 7198 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-07-13 18:21:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:20,098 INFO L93 Difference]: Finished difference Result 14607 states and 23239 transitions. [2022-07-13 18:21:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:21:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 71 [2022-07-13 18:21:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:20,145 INFO L225 Difference]: With dead ends: 14607 [2022-07-13 18:21:20,145 INFO L226 Difference]: Without dead ends: 10142 [2022-07-13 18:21:20,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:20,150 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 336 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:20,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 623 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2022-07-13 18:21:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7308. [2022-07-13 18:21:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 1.574654440947037) internal successors, (11506), 7307 states have internal predecessors, (11506), 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) [2022-07-13 18:21:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 11506 transitions. [2022-07-13 18:21:20,541 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 11506 transitions. Word has length 71 [2022-07-13 18:21:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:20,541 INFO L495 AbstractCegarLoop]: Abstraction has 7308 states and 11506 transitions. [2022-07-13 18:21:20,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-07-13 18:21:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 11506 transitions. [2022-07-13 18:21:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 18:21:20,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:20,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:20,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:21:20,542 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:20,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2022-07-13 18:21:20,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:20,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803072369] [2022-07-13 18:21:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:20,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:20,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:20,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803072369] [2022-07-13 18:21:20,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803072369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:20,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:20,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:21:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27651219] [2022-07-13 18:21:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:20,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:21:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:21:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:21:20,585 INFO L87 Difference]: Start difference. First operand 7308 states and 11506 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2022-07-13 18:21:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:21,122 INFO L93 Difference]: Finished difference Result 23155 states and 36579 transitions. [2022-07-13 18:21:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:21:21,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 72 [2022-07-13 18:21:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:21,143 INFO L225 Difference]: With dead ends: 23155 [2022-07-13 18:21:21,144 INFO L226 Difference]: Without dead ends: 15926 [2022-07-13 18:21:21,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:21,150 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 334 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:21,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 625 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2022-07-13 18:21:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 11564. [2022-07-13 18:21:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11564 states, 11563 states have (on average 1.5641269566721439) internal successors, (18086), 11563 states have internal predecessors, (18086), 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) [2022-07-13 18:21:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11564 states to 11564 states and 18086 transitions. [2022-07-13 18:21:21,585 INFO L78 Accepts]: Start accepts. Automaton has 11564 states and 18086 transitions. Word has length 72 [2022-07-13 18:21:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:21,585 INFO L495 AbstractCegarLoop]: Abstraction has 11564 states and 18086 transitions. [2022-07-13 18:21:21,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2022-07-13 18:21:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 11564 states and 18086 transitions. [2022-07-13 18:21:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 18:21:21,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:21,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:21,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 18:21:21,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:21,588 INFO L85 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2022-07-13 18:21:21,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:21,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470948471] [2022-07-13 18:21:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:21,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:21,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:21,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470948471] [2022-07-13 18:21:21,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470948471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:21,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:21,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:21,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919932688] [2022-07-13 18:21:21,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:21,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:21,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:21,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:21,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:21,651 INFO L87 Difference]: Start difference. First operand 11564 states and 18086 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-07-13 18:21:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:22,039 INFO L93 Difference]: Finished difference Result 23051 states and 36068 transitions. [2022-07-13 18:21:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:21:22,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 74 [2022-07-13 18:21:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:22,056 INFO L225 Difference]: With dead ends: 23051 [2022-07-13 18:21:22,056 INFO L226 Difference]: Without dead ends: 11566 [2022-07-13 18:21:22,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:21:22,065 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 335 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:22,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 514 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11566 states. [2022-07-13 18:21:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11566 to 11564. [2022-07-13 18:21:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11564 states, 11563 states have (on average 1.5511545446683386) internal successors, (17936), 11563 states have internal predecessors, (17936), 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) [2022-07-13 18:21:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11564 states to 11564 states and 17936 transitions. [2022-07-13 18:21:22,515 INFO L78 Accepts]: Start accepts. Automaton has 11564 states and 17936 transitions. Word has length 74 [2022-07-13 18:21:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:22,515 INFO L495 AbstractCegarLoop]: Abstraction has 11564 states and 17936 transitions. [2022-07-13 18:21:22,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-07-13 18:21:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 11564 states and 17936 transitions. [2022-07-13 18:21:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 18:21:22,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:22,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:22,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 18:21:22,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:22,517 INFO L85 PathProgramCache]: Analyzing trace with hash 251102324, now seen corresponding path program 1 times [2022-07-13 18:21:22,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:22,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006804237] [2022-07-13 18:21:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:22,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:22,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006804237] [2022-07-13 18:21:22,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006804237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:22,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:22,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134169167] [2022-07-13 18:21:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:22,578 INFO L87 Difference]: Start difference. First operand 11564 states and 17936 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2022-07-13 18:21:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:23,270 INFO L93 Difference]: Finished difference Result 33350 states and 51874 transitions. [2022-07-13 18:21:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:21:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 77 [2022-07-13 18:21:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:23,309 INFO L225 Difference]: With dead ends: 33350 [2022-07-13 18:21:23,309 INFO L226 Difference]: Without dead ends: 21865 [2022-07-13 18:21:23,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:21:23,323 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 329 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:23,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 519 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21865 states. [2022-07-13 18:21:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21865 to 21863. [2022-07-13 18:21:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21863 states, 21862 states have (on average 1.5381941267953527) internal successors, (33628), 21862 states have internal predecessors, (33628), 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) [2022-07-13 18:21:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21863 states to 21863 states and 33628 transitions. [2022-07-13 18:21:24,076 INFO L78 Accepts]: Start accepts. Automaton has 21863 states and 33628 transitions. Word has length 77 [2022-07-13 18:21:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:24,076 INFO L495 AbstractCegarLoop]: Abstraction has 21863 states and 33628 transitions. [2022-07-13 18:21:24,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2022-07-13 18:21:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21863 states and 33628 transitions. [2022-07-13 18:21:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:21:24,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:24,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:24,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 18:21:24,077 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1234338215, now seen corresponding path program 1 times [2022-07-13 18:21:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:24,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614650593] [2022-07-13 18:21:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:24,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:21:24,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614650593] [2022-07-13 18:21:24,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614650593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:24,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:24,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 18:21:24,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346728856] [2022-07-13 18:21:24,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:24,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 18:21:24,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 18:21:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:21:24,165 INFO L87 Difference]: Start difference. First operand 21863 states and 33628 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2022-07-13 18:21:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:25,903 INFO L93 Difference]: Finished difference Result 44535 states and 67775 transitions. [2022-07-13 18:21:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 18:21:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 78 [2022-07-13 18:21:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:25,974 INFO L225 Difference]: With dead ends: 44535 [2022-07-13 18:21:25,975 INFO L226 Difference]: Without dead ends: 44533 [2022-07-13 18:21:25,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:21:25,990 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 664 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:25,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 1194 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:21:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44533 states. [2022-07-13 18:21:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44533 to 23024. [2022-07-13 18:21:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23024 states, 23023 states have (on average 1.5106632497936845) internal successors, (34780), 23023 states have internal predecessors, (34780), 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) [2022-07-13 18:21:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23024 states to 23024 states and 34780 transitions. [2022-07-13 18:21:27,699 INFO L78 Accepts]: Start accepts. Automaton has 23024 states and 34780 transitions. Word has length 78 [2022-07-13 18:21:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:27,699 INFO L495 AbstractCegarLoop]: Abstraction has 23024 states and 34780 transitions. [2022-07-13 18:21:27,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2022-07-13 18:21:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 23024 states and 34780 transitions. [2022-07-13 18:21:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 18:21:27,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:27,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:27,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 18:21:27,718 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1630330772, now seen corresponding path program 1 times [2022-07-13 18:21:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:27,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303142221] [2022-07-13 18:21:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:21:27,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:27,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303142221] [2022-07-13 18:21:27,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303142221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:27,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:27,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:27,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161263527] [2022-07-13 18:21:27,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:27,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:27,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:27,803 INFO L87 Difference]: Start difference. First operand 23024 states and 34780 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-07-13 18:21:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:29,956 INFO L93 Difference]: Finished difference Result 60176 states and 91088 transitions. [2022-07-13 18:21:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:21:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 103 [2022-07-13 18:21:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:30,086 INFO L225 Difference]: With dead ends: 60176 [2022-07-13 18:21:30,099 INFO L226 Difference]: Without dead ends: 46884 [2022-07-13 18:21:30,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:21:30,140 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 423 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:30,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 767 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:21:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46884 states. [2022-07-13 18:21:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46884 to 35852. [2022-07-13 18:21:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35852 states, 35851 states have (on average 1.5082982343588742) internal successors, (54074), 35851 states have internal predecessors, (54074), 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) [2022-07-13 18:21:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35852 states to 35852 states and 54074 transitions. [2022-07-13 18:21:32,513 INFO L78 Accepts]: Start accepts. Automaton has 35852 states and 54074 transitions. Word has length 103 [2022-07-13 18:21:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:32,514 INFO L495 AbstractCegarLoop]: Abstraction has 35852 states and 54074 transitions. [2022-07-13 18:21:32,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-07-13 18:21:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 35852 states and 54074 transitions. [2022-07-13 18:21:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 18:21:32,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:32,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 18:21:32,516 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash -743960700, now seen corresponding path program 1 times [2022-07-13 18:21:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473386201] [2022-07-13 18:21:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:21:32,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473386201] [2022-07-13 18:21:32,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473386201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:32,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:32,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:32,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991507422] [2022-07-13 18:21:32,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:32,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:32,565 INFO L87 Difference]: Start difference. First operand 35852 states and 54074 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2022-07-13 18:21:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:35,097 INFO L93 Difference]: Finished difference Result 66022 states and 100055 transitions. [2022-07-13 18:21:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:21:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 103 [2022-07-13 18:21:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:35,180 INFO L225 Difference]: With dead ends: 66022 [2022-07-13 18:21:35,180 INFO L226 Difference]: Without dead ends: 55404 [2022-07-13 18:21:35,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:21:35,224 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 421 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:35,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 816 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55404 states. [2022-07-13 18:21:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55404 to 50070. [2022-07-13 18:21:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50070 states, 50069 states have (on average 1.5074597056062633) internal successors, (75477), 50069 states have internal predecessors, (75477), 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) [2022-07-13 18:21:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50070 states to 50070 states and 75477 transitions. [2022-07-13 18:21:37,738 INFO L78 Accepts]: Start accepts. Automaton has 50070 states and 75477 transitions. Word has length 103 [2022-07-13 18:21:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:37,738 INFO L495 AbstractCegarLoop]: Abstraction has 50070 states and 75477 transitions. [2022-07-13 18:21:37,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2022-07-13 18:21:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 50070 states and 75477 transitions. [2022-07-13 18:21:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 18:21:37,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:37,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 18:21:37,741 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash 910392184, now seen corresponding path program 1 times [2022-07-13 18:21:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:37,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581636267] [2022-07-13 18:21:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:21:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581636267] [2022-07-13 18:21:37,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581636267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:37,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:37,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:37,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867133328] [2022-07-13 18:21:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:37,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:37,822 INFO L87 Difference]: Start difference. First operand 50070 states and 75477 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2022-07-13 18:21:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:40,185 INFO L93 Difference]: Finished difference Result 70278 states and 106535 transitions. [2022-07-13 18:21:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:21:40,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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 103 [2022-07-13 18:21:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:40,304 INFO L225 Difference]: With dead ends: 70278 [2022-07-13 18:21:40,304 INFO L226 Difference]: Without dead ends: 59660 [2022-07-13 18:21:40,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:21:40,326 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 422 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:40,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 841 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59660 states. [2022-07-13 18:21:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59660 to 57518. [2022-07-13 18:21:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57518 states, 57517 states have (on average 1.5097275588087) internal successors, (86835), 57517 states have internal predecessors, (86835), 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) [2022-07-13 18:21:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57518 states to 57518 states and 86835 transitions. [2022-07-13 18:21:43,596 INFO L78 Accepts]: Start accepts. Automaton has 57518 states and 86835 transitions. Word has length 103 [2022-07-13 18:21:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:43,597 INFO L495 AbstractCegarLoop]: Abstraction has 57518 states and 86835 transitions. [2022-07-13 18:21:43,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2022-07-13 18:21:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 57518 states and 86835 transitions. [2022-07-13 18:21:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 18:21:43,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:43,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:43,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 18:21:43,600 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash -923479025, now seen corresponding path program 1 times [2022-07-13 18:21:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:43,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781657481] [2022-07-13 18:21:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:21:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781657481] [2022-07-13 18:21:43,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781657481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:43,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:43,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:21:43,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468682598] [2022-07-13 18:21:43,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:43,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:21:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:21:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:21:43,637 INFO L87 Difference]: Start difference. First operand 57518 states and 86835 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2022-07-13 18:21:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:47,454 INFO L93 Difference]: Finished difference Result 98887 states and 149843 transitions. [2022-07-13 18:21:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:21:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 104 [2022-07-13 18:21:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:47,572 INFO L225 Difference]: With dead ends: 98887 [2022-07-13 18:21:47,572 INFO L226 Difference]: Without dead ends: 77075 [2022-07-13 18:21:47,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:21:47,601 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 187 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:47,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 575 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:47,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77075 states. [2022-07-13 18:21:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77075 to 74935. [2022-07-13 18:21:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74935 states, 74934 states have (on average 1.5073131021965998) internal successors, (112949), 74934 states have internal predecessors, (112949), 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) [2022-07-13 18:21:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74935 states to 74935 states and 112949 transitions. [2022-07-13 18:21:52,322 INFO L78 Accepts]: Start accepts. Automaton has 74935 states and 112949 transitions. Word has length 104 [2022-07-13 18:21:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:52,322 INFO L495 AbstractCegarLoop]: Abstraction has 74935 states and 112949 transitions. [2022-07-13 18:21:52,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2022-07-13 18:21:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 74935 states and 112949 transitions. [2022-07-13 18:21:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 18:21:52,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:52,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:21:52,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 18:21:52,343 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1887965934, now seen corresponding path program 1 times [2022-07-13 18:21:52,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:52,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434764367] [2022-07-13 18:21:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:52,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:21:52,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434764367] [2022-07-13 18:21:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434764367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:52,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:52,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:21:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278531705] [2022-07-13 18:21:52,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:52,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:21:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:21:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:21:52,557 INFO L87 Difference]: Start difference. First operand 74935 states and 112949 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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)