./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.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 6d316a7ba22efd80f1b38cf51bd9ff0ce90b0827d98cb289348ffc09e69061f8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:01:22,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:01:22,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:01:22,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:01:22,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:01:22,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:01:22,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:01:22,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:01:22,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:01:22,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:01:22,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:01:22,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:01:22,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:01:22,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:01:22,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:01:22,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:01:23,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:01:23,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:01:23,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:01:23,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:01:23,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:01:23,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:01:23,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:01:23,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:01:23,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:01:23,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:01:23,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:01:23,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:01:23,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:01:23,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:01:23,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:01:23,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:01:23,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:01:23,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:01:23,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:01:23,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:01:23,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:01:23,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:01:23,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:01:23,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:01:23,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:01:23,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:01:23,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:01:23,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:01:23,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:01:23,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:01:23,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:01:23,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:01:23,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:01:23,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:01:23,048 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:01:23,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:01:23,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:01:23,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:01:23,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:01:23,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:01:23,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:01:23,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:01:23,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:01:23,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:01:23,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:01:23,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:01:23,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:01:23,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:01:23,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:01:23,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:01:23,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:01:23,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:01:23,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:01:23,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:01:23,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:01:23,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:01:23,052 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:01:23,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:01:23,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:01:23,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:01:23,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d316a7ba22efd80f1b38cf51bd9ff0ce90b0827d98cb289348ffc09e69061f8 [2021-12-17 21:01:23,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:01:23,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:01:23,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:01:23,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:01:23,248 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:01:23,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-12-17 21:01:23,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f83709c/b8a2cfd715694a44bafb67de549fc7c2/FLAG340c9799e [2021-12-17 21:01:23,854 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:01:23,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-12-17 21:01:23,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f83709c/b8a2cfd715694a44bafb67de549fc7c2/FLAG340c9799e [2021-12-17 21:01:24,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f83709c/b8a2cfd715694a44bafb67de549fc7c2 [2021-12-17 21:01:24,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:01:24,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:01:24,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:01:24,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:01:24,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:01:24,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:01:24" (1/1) ... [2021-12-17 21:01:24,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a4499f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:24, skipping insertion in model container [2021-12-17 21:01:24,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:01:24" (1/1) ... [2021-12-17 21:01:24,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:01:24,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:01:24,495 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[26888,26901] [2021-12-17 21:01:24,534 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[29705,29718] [2021-12-17 21:01:25,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:01:25,045 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:01:25,084 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[26888,26901] [2021-12-17 21:01:25,091 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[29705,29718] [2021-12-17 21:01:25,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:01:25,414 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:01:25,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25 WrapperNode [2021-12-17 21:01:25,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:01:25,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:01:25,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:01:25,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:01:25,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:25,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:25,704 INFO L137 Inliner]: procedures = 40, calls = 25, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 5279 [2021-12-17 21:01:25,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:01:25,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:01:25,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:01:25,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:01:25,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:25,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:25,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:25,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:25,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:26,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:26,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:26,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:01:26,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:01:26,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:01:26,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:01:26,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (1/1) ... [2021-12-17 21:01:26,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:01:26,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:01:26,196 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) [2021-12-17 21:01:26,201 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 [2021-12-17 21:01:26,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:01:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:01:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:01:26,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:01:26,350 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:01:26,351 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:01:28,950 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:01:28,967 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:01:28,967 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:01:28,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:01:28 BoogieIcfgContainer [2021-12-17 21:01:28,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:01:28,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:01:28,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:01:28,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:01:28,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:01:24" (1/3) ... [2021-12-17 21:01:28,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3897d9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:01:28, skipping insertion in model container [2021-12-17 21:01:28,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:01:25" (2/3) ... [2021-12-17 21:01:28,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3897d9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:01:28, skipping insertion in model container [2021-12-17 21:01:28,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:01:28" (3/3) ... [2021-12-17 21:01:28,976 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-12-17 21:01:28,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:01:28,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:01:29,022 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:01:29,031 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:01:29,032 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:01:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 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) [2021-12-17 21:01:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 21:01:29,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:29,072 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:01:29,072 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:29,076 INFO L85 PathProgramCache]: Analyzing trace with hash -25024235, now seen corresponding path program 1 times [2021-12-17 21:01:29,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:29,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195148212] [2021-12-17 21:01:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:29,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:29,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:29,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195148212] [2021-12-17 21:01:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195148212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:29,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:29,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:01:29,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535841290] [2021-12-17 21:01:29,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:29,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:29,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:29,281 INFO L87 Difference]: Start difference. First operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-12-17 21:01:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:32,065 INFO L93 Difference]: Finished difference Result 2616 states and 5018 transitions. [2021-12-17 21:01:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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 24 [2021-12-17 21:01:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:32,083 INFO L225 Difference]: With dead ends: 2616 [2021-12-17 21:01:32,083 INFO L226 Difference]: Without dead ends: 1650 [2021-12-17 21:01:32,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:32,091 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 1053 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:32,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 842 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 21:01:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-17 21:01:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-12-17 21:01:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.5764563106796117) internal successors, (2598), 1649 states have internal predecessors, (2598), 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) [2021-12-17 21:01:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2598 transitions. [2021-12-17 21:01:32,167 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2598 transitions. Word has length 24 [2021-12-17 21:01:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:32,168 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2598 transitions. [2021-12-17 21:01:32,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-12-17 21:01:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2598 transitions. [2021-12-17 21:01:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 21:01:32,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:32,170 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:01:32,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:01:32,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2021-12-17 21:01:32,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:32,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485145728] [2021-12-17 21:01:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:32,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:32,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485145728] [2021-12-17 21:01:32,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485145728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:32,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:32,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:01:32,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952759385] [2021-12-17 21:01:32,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:32,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:01:32,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:01:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:01:32,268 INFO L87 Difference]: Start difference. First operand 1650 states and 2598 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2021-12-17 21:01:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:32,341 INFO L93 Difference]: Finished difference Result 1732 states and 2726 transitions. [2021-12-17 21:01:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:01:32,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 46 [2021-12-17 21:01:32,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:32,346 INFO L225 Difference]: With dead ends: 1732 [2021-12-17 21:01:32,346 INFO L226 Difference]: Without dead ends: 1650 [2021-12-17 21:01:32,347 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:32,348 INFO L933 BasicCegarLoop]: 1689 mSDtfsCounter, 3 mSDsluCounter, 5003 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:32,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6692 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-17 21:01:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-12-17 21:01:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.5394417475728155) internal successors, (2537), 1649 states have internal predecessors, (2537), 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) [2021-12-17 21:01:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2537 transitions. [2021-12-17 21:01:32,407 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2537 transitions. Word has length 46 [2021-12-17 21:01:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:32,407 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2537 transitions. [2021-12-17 21:01:32,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2021-12-17 21:01:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2537 transitions. [2021-12-17 21:01:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 21:01:32,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:32,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 21:01:32,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:01:32,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 39614916, now seen corresponding path program 1 times [2021-12-17 21:01:32,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943558093] [2021-12-17 21:01:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:32,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:32,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943558093] [2021-12-17 21:01:32,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943558093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:01:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492356968] [2021-12-17 21:01:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:32,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:01:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:01:32,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:01:32,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:01:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:01:32,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:01:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:32,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:01:32,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492356968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:32,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:01:32,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 21:01:32,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727061475] [2021-12-17 21:01:32,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:32,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:32,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:01:32,829 INFO L87 Difference]: Start difference. First operand 1650 states and 2537 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-12-17 21:01:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:35,365 INFO L93 Difference]: Finished difference Result 4656 states and 7224 transitions. [2021-12-17 21:01:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 95 [2021-12-17 21:01:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:35,376 INFO L225 Difference]: With dead ends: 4656 [2021-12-17 21:01:35,376 INFO L226 Difference]: Without dead ends: 3152 [2021-12-17 21:01:35,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:01:35,380 INFO L933 BasicCegarLoop]: 1261 mSDtfsCounter, 754 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:35,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1460 Invalid, 3084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 2373 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 21:01:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-12-17 21:01:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2021-12-17 21:01:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3150 states have (on average 1.465079365079365) internal successors, (4615), 3151 states have internal predecessors, (4615), 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) [2021-12-17 21:01:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4615 transitions. [2021-12-17 21:01:35,428 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4615 transitions. Word has length 95 [2021-12-17 21:01:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:35,429 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 4615 transitions. [2021-12-17 21:01:35,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-12-17 21:01:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4615 transitions. [2021-12-17 21:01:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 21:01:35,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:35,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 21:01:35,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:01:35,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:01:35,644 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1598092553, now seen corresponding path program 1 times [2021-12-17 21:01:35,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:35,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108779397] [2021-12-17 21:01:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:35,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:35,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:35,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108779397] [2021-12-17 21:01:35,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108779397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:35,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:35,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:35,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300427825] [2021-12-17 21:01:35,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:35,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:01:35,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:35,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:01:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:01:35,800 INFO L87 Difference]: Start difference. First operand 3152 states and 4615 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-17 21:01:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:39,375 INFO L93 Difference]: Finished difference Result 9921 states and 14373 transitions. [2021-12-17 21:01:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:01:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-12-17 21:01:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:39,392 INFO L225 Difference]: With dead ends: 9921 [2021-12-17 21:01:39,392 INFO L226 Difference]: Without dead ends: 6915 [2021-12-17 21:01:39,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:01:39,397 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 2614 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2614 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 4810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:39,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2614 Valid, 545 Invalid, 4810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 21:01:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2021-12-17 21:01:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6907. [2021-12-17 21:01:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6905 states have (on average 1.3678493845039825) internal successors, (9445), 6906 states have internal predecessors, (9445), 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) [2021-12-17 21:01:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 9445 transitions. [2021-12-17 21:01:39,500 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 9445 transitions. Word has length 97 [2021-12-17 21:01:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:39,500 INFO L470 AbstractCegarLoop]: Abstraction has 6907 states and 9445 transitions. [2021-12-17 21:01:39,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-17 21:01:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 9445 transitions. [2021-12-17 21:01:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:39,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:39,501 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:39,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:01:39,502 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:39,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:39,502 INFO L85 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2021-12-17 21:01:39,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:39,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020926901] [2021-12-17 21:01:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:39,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:39,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020926901] [2021-12-17 21:01:39,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020926901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:39,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:39,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:39,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180939840] [2021-12-17 21:01:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:39,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:39,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:39,590 INFO L87 Difference]: Start difference. First operand 6907 states and 9445 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:39,627 INFO L93 Difference]: Finished difference Result 7057 states and 9683 transitions. [2021-12-17 21:01:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:39,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:39,647 INFO L225 Difference]: With dead ends: 7057 [2021-12-17 21:01:39,647 INFO L226 Difference]: Without dead ends: 6979 [2021-12-17 21:01:39,649 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:39,651 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 1549 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1850 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 [2021-12-17 21:01:39,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1850 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-12-17 21:01:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 6977. [2021-12-17 21:01:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6977 states, 6975 states have (on average 1.3701792114695341) internal successors, (9557), 6976 states have internal predecessors, (9557), 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) [2021-12-17 21:01:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 9557 transitions. [2021-12-17 21:01:39,759 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 9557 transitions. Word has length 106 [2021-12-17 21:01:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 6977 states and 9557 transitions. [2021-12-17 21:01:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 9557 transitions. [2021-12-17 21:01:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:39,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:39,764 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:39,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:01:39,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2021-12-17 21:01:39,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:39,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208003637] [2021-12-17 21:01:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:39,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:39,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:39,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208003637] [2021-12-17 21:01:39,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208003637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:39,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:39,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:39,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498873590] [2021-12-17 21:01:39,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:39,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:39,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:39,828 INFO L87 Difference]: Start difference. First operand 6977 states and 9557 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:39,870 INFO L93 Difference]: Finished difference Result 7261 states and 10009 transitions. [2021-12-17 21:01:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:39,904 INFO L225 Difference]: With dead ends: 7261 [2021-12-17 21:01:39,904 INFO L226 Difference]: Without dead ends: 7113 [2021-12-17 21:01:39,907 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:39,909 INFO L933 BasicCegarLoop]: 1719 mSDtfsCounter, 1545 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1849 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 [2021-12-17 21:01:39,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1545 Valid, 1849 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-12-17 21:01:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 7111. [2021-12-17 21:01:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7109 states have (on average 1.374314249542833) internal successors, (9770), 7110 states have internal predecessors, (9770), 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) [2021-12-17 21:01:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 9770 transitions. [2021-12-17 21:01:40,026 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 9770 transitions. Word has length 106 [2021-12-17 21:01:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:40,026 INFO L470 AbstractCegarLoop]: Abstraction has 7111 states and 9770 transitions. [2021-12-17 21:01:40,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 9770 transitions. [2021-12-17 21:01:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:40,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:40,028 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:40,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:01:40,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:40,029 INFO L85 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2021-12-17 21:01:40,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:40,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698961928] [2021-12-17 21:01:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:40,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:40,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:40,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698961928] [2021-12-17 21:01:40,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698961928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:40,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:40,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:40,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735753458] [2021-12-17 21:01:40,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:40,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:40,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:40,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:40,080 INFO L87 Difference]: Start difference. First operand 7111 states and 9770 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:40,110 INFO L93 Difference]: Finished difference Result 7651 states and 10628 transitions. [2021-12-17 21:01:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:40,121 INFO L225 Difference]: With dead ends: 7651 [2021-12-17 21:01:40,121 INFO L226 Difference]: Without dead ends: 7369 [2021-12-17 21:01:40,123 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:40,123 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 1541 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1848 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 [2021-12-17 21:01:40,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1848 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7369 states. [2021-12-17 21:01:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7369 to 7367. [2021-12-17 21:01:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7367 states, 7365 states have (on average 1.381398506449423) internal successors, (10174), 7366 states have internal predecessors, (10174), 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) [2021-12-17 21:01:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7367 states to 7367 states and 10174 transitions. [2021-12-17 21:01:40,216 INFO L78 Accepts]: Start accepts. Automaton has 7367 states and 10174 transitions. Word has length 106 [2021-12-17 21:01:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:40,217 INFO L470 AbstractCegarLoop]: Abstraction has 7367 states and 10174 transitions. [2021-12-17 21:01:40,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7367 states and 10174 transitions. [2021-12-17 21:01:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:40,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:40,218 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:40,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:01:40,218 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2021-12-17 21:01:40,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:40,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12821742] [2021-12-17 21:01:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:40,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:40,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12821742] [2021-12-17 21:01:40,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12821742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:40,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:40,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:40,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335944348] [2021-12-17 21:01:40,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:40,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:40,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:40,256 INFO L87 Difference]: Start difference. First operand 7367 states and 10174 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:40,290 INFO L93 Difference]: Finished difference Result 8395 states and 11800 transitions. [2021-12-17 21:01:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:40,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:40,301 INFO L225 Difference]: With dead ends: 8395 [2021-12-17 21:01:40,301 INFO L226 Difference]: Without dead ends: 7857 [2021-12-17 21:01:40,304 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:40,304 INFO L933 BasicCegarLoop]: 1709 mSDtfsCounter, 1537 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1847 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 [2021-12-17 21:01:40,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1847 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2021-12-17 21:01:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 7855. [2021-12-17 21:01:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7855 states, 7853 states have (on average 1.3928434992996308) internal successors, (10938), 7854 states have internal predecessors, (10938), 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) [2021-12-17 21:01:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7855 states to 7855 states and 10938 transitions. [2021-12-17 21:01:40,419 INFO L78 Accepts]: Start accepts. Automaton has 7855 states and 10938 transitions. Word has length 106 [2021-12-17 21:01:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:40,419 INFO L470 AbstractCegarLoop]: Abstraction has 7855 states and 10938 transitions. [2021-12-17 21:01:40,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7855 states and 10938 transitions. [2021-12-17 21:01:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:40,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:40,420 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:40,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:01:40,421 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2021-12-17 21:01:40,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:40,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852780257] [2021-12-17 21:01:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:40,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:40,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852780257] [2021-12-17 21:01:40,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852780257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:40,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:40,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:40,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018166773] [2021-12-17 21:01:40,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:40,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:40,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:40,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:40,458 INFO L87 Difference]: Start difference. First operand 7855 states and 10938 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:40,501 INFO L93 Difference]: Finished difference Result 9811 states and 14012 transitions. [2021-12-17 21:01:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:40,513 INFO L225 Difference]: With dead ends: 9811 [2021-12-17 21:01:40,514 INFO L226 Difference]: Without dead ends: 8785 [2021-12-17 21:01:40,519 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:40,520 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1533 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1846 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 [2021-12-17 21:01:40,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 1846 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-12-17 21:01:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 8783. [2021-12-17 21:01:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8783 states, 8781 states have (on average 1.4096344379911172) internal successors, (12378), 8782 states have internal predecessors, (12378), 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) [2021-12-17 21:01:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8783 states to 8783 states and 12378 transitions. [2021-12-17 21:01:40,621 INFO L78 Accepts]: Start accepts. Automaton has 8783 states and 12378 transitions. Word has length 106 [2021-12-17 21:01:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:40,621 INFO L470 AbstractCegarLoop]: Abstraction has 8783 states and 12378 transitions. [2021-12-17 21:01:40,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8783 states and 12378 transitions. [2021-12-17 21:01:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:40,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:40,623 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:40,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:01:40,623 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:40,624 INFO L85 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2021-12-17 21:01:40,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:40,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84858085] [2021-12-17 21:01:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:40,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:40,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84858085] [2021-12-17 21:01:40,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84858085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:40,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:40,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:40,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878391527] [2021-12-17 21:01:40,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:40,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:40,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:40,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:40,678 INFO L87 Difference]: Start difference. First operand 8783 states and 12378 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:40,742 INFO L93 Difference]: Finished difference Result 12499 states and 18172 transitions. [2021-12-17 21:01:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:40,756 INFO L225 Difference]: With dead ends: 12499 [2021-12-17 21:01:40,757 INFO L226 Difference]: Without dead ends: 10545 [2021-12-17 21:01:40,762 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:40,762 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 1529 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1845 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 [2021-12-17 21:01:40,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1845 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10545 states. [2021-12-17 21:01:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10545 to 10543. [2021-12-17 21:01:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10543 states, 10541 states have (on average 1.4307940423109762) internal successors, (15082), 10542 states have internal predecessors, (15082), 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) [2021-12-17 21:01:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10543 states to 10543 states and 15082 transitions. [2021-12-17 21:01:40,902 INFO L78 Accepts]: Start accepts. Automaton has 10543 states and 15082 transitions. Word has length 106 [2021-12-17 21:01:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:40,902 INFO L470 AbstractCegarLoop]: Abstraction has 10543 states and 15082 transitions. [2021-12-17 21:01:40,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10543 states and 15082 transitions. [2021-12-17 21:01:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:40,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:40,903 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:40,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:01:40,904 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:40,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2021-12-17 21:01:40,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:40,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550081845] [2021-12-17 21:01:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:40,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:40,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550081845] [2021-12-17 21:01:40,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550081845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:40,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:40,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:40,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424032669] [2021-12-17 21:01:40,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:40,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:40,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:40,950 INFO L87 Difference]: Start difference. First operand 10543 states and 15082 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:41,117 INFO L93 Difference]: Finished difference Result 17587 states and 25964 transitions. [2021-12-17 21:01:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:41,141 INFO L225 Difference]: With dead ends: 17587 [2021-12-17 21:01:41,141 INFO L226 Difference]: Without dead ends: 13873 [2021-12-17 21:01:41,147 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:41,148 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1525 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1844 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 [2021-12-17 21:01:41,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1844 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13873 states. [2021-12-17 21:01:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13873 to 13871. [2021-12-17 21:01:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13871 states, 13869 states have (on average 1.4520152858893935) internal successors, (20138), 13870 states have internal predecessors, (20138), 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) [2021-12-17 21:01:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13871 states to 13871 states and 20138 transitions. [2021-12-17 21:01:41,360 INFO L78 Accepts]: Start accepts. Automaton has 13871 states and 20138 transitions. Word has length 106 [2021-12-17 21:01:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:41,360 INFO L470 AbstractCegarLoop]: Abstraction has 13871 states and 20138 transitions. [2021-12-17 21:01:41,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-17 21:01:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 13871 states and 20138 transitions. [2021-12-17 21:01:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:01:41,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:41,362 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:41,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:01:41,362 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:41,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2021-12-17 21:01:41,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:41,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94242089] [2021-12-17 21:01:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:41,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:41,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94242089] [2021-12-17 21:01:41,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94242089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:41,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:41,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:01:41,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611799655] [2021-12-17 21:01:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:41,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:01:41,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:01:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:01:41,446 INFO L87 Difference]: Start difference. First operand 13871 states and 20138 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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) [2021-12-17 21:01:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:43,400 INFO L93 Difference]: Finished difference Result 126543 states and 193210 transitions. [2021-12-17 21:01:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:01:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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 106 [2021-12-17 21:01:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:43,778 INFO L225 Difference]: With dead ends: 126543 [2021-12-17 21:01:43,778 INFO L226 Difference]: Without dead ends: 119501 [2021-12-17 21:01:43,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-12-17 21:01:43,820 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 15488 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15488 SdHoareTripleChecker+Valid, 4869 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:43,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15488 Valid, 4869 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:01:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119501 states. [2021-12-17 21:01:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119501 to 20911. [2021-12-17 21:01:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20911 states, 20909 states have (on average 1.46817160074609) internal successors, (30698), 20910 states have internal predecessors, (30698), 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) [2021-12-17 21:01:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20911 states to 20911 states and 30698 transitions. [2021-12-17 21:01:44,991 INFO L78 Accepts]: Start accepts. Automaton has 20911 states and 30698 transitions. Word has length 106 [2021-12-17 21:01:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:44,991 INFO L470 AbstractCegarLoop]: Abstraction has 20911 states and 30698 transitions. [2021-12-17 21:01:44,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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) [2021-12-17 21:01:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 20911 states and 30698 transitions. [2021-12-17 21:01:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 21:01:44,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:44,993 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:01:44,993 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2021-12-17 21:01:44,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136094564] [2021-12-17 21:01:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:44,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:45,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:45,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136094564] [2021-12-17 21:01:45,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136094564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:45,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:45,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:45,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800160776] [2021-12-17 21:01:45,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:45,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:45,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:45,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:45,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:45,043 INFO L87 Difference]: Start difference. First operand 20911 states and 30698 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:01:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:46,019 INFO L93 Difference]: Finished difference Result 47667 states and 71020 transitions. [2021-12-17 21:01:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:46,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-17 21:01:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:46,075 INFO L225 Difference]: With dead ends: 47667 [2021-12-17 21:01:46,075 INFO L226 Difference]: Without dead ends: 33585 [2021-12-17 21:01:46,096 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:46,098 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 1516 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:46,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33585 states. [2021-12-17 21:01:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33585 to 33327. [2021-12-17 21:01:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33325 states have (on average 1.4627456864216053) internal successors, (48746), 33326 states have internal predecessors, (48746), 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) [2021-12-17 21:01:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 48746 transitions. [2021-12-17 21:01:47,204 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 48746 transitions. Word has length 108 [2021-12-17 21:01:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:47,205 INFO L470 AbstractCegarLoop]: Abstraction has 33327 states and 48746 transitions. [2021-12-17 21:01:47,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:01:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 48746 transitions. [2021-12-17 21:01:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 21:01:47,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:47,206 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:47,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:01:47,206 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2021-12-17 21:01:47,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:47,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078327987] [2021-12-17 21:01:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:47,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:47,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078327987] [2021-12-17 21:01:47,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078327987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:47,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:47,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:01:47,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574103079] [2021-12-17 21:01:47,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:47,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:01:47,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:01:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:01:47,440 INFO L87 Difference]: Start difference. First operand 33327 states and 48746 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:01:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:48,550 INFO L93 Difference]: Finished difference Result 59827 states and 88172 transitions. [2021-12-17 21:01:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:01:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-17 21:01:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:48,594 INFO L225 Difference]: With dead ends: 59827 [2021-12-17 21:01:48,594 INFO L226 Difference]: Without dead ends: 33329 [2021-12-17 21:01:48,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:01:48,620 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 3608 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3608 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:48,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3608 Valid, 2470 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:01:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33329 states. [2021-12-17 21:01:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33329 to 33327. [2021-12-17 21:01:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33325 states have (on average 1.4550637659414853) internal successors, (48490), 33326 states have internal predecessors, (48490), 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) [2021-12-17 21:01:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 48490 transitions. [2021-12-17 21:01:49,778 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 48490 transitions. Word has length 108 [2021-12-17 21:01:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:49,778 INFO L470 AbstractCegarLoop]: Abstraction has 33327 states and 48490 transitions. [2021-12-17 21:01:49,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:01:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 48490 transitions. [2021-12-17 21:01:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 21:01:49,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:49,780 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:49,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:01:49,780 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2021-12-17 21:01:49,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205548282] [2021-12-17 21:01:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:49,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:49,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:49,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205548282] [2021-12-17 21:01:49,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205548282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:49,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:49,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:01:49,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072487721] [2021-12-17 21:01:49,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:49,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:01:49,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:01:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:01:49,858 INFO L87 Difference]: Start difference. First operand 33327 states and 48490 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-12-17 21:01:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:50,949 INFO L93 Difference]: Finished difference Result 59825 states and 87659 transitions. [2021-12-17 21:01:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:01:50,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-17 21:01:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:50,990 INFO L225 Difference]: With dead ends: 59825 [2021-12-17 21:01:50,991 INFO L226 Difference]: Without dead ends: 33327 [2021-12-17 21:01:51,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:01:51,018 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 4843 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4843 SdHoareTripleChecker+Valid, 3092 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:51,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4843 Valid, 3092 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33327 states. [2021-12-17 21:01:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33327 to 33327. [2021-12-17 21:01:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33325 states have (on average 1.4473818454613654) internal successors, (48234), 33326 states have internal predecessors, (48234), 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) [2021-12-17 21:01:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 48234 transitions. [2021-12-17 21:01:52,209 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 48234 transitions. Word has length 109 [2021-12-17 21:01:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:52,209 INFO L470 AbstractCegarLoop]: Abstraction has 33327 states and 48234 transitions. [2021-12-17 21:01:52,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-12-17 21:01:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 48234 transitions. [2021-12-17 21:01:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 21:01:52,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:52,210 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:52,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:01:52,210 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2021-12-17 21:01:52,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:52,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142760535] [2021-12-17 21:01:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:52,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:52,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142760535] [2021-12-17 21:01:52,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142760535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:52,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:52,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:01:52,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352999208] [2021-12-17 21:01:52,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:52,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:01:52,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:01:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:01:52,295 INFO L87 Difference]: Start difference. First operand 33327 states and 48234 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 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) [2021-12-17 21:01:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:54,115 INFO L93 Difference]: Finished difference Result 52953 states and 76703 transitions. [2021-12-17 21:01:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:01:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-17 21:01:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:54,200 INFO L225 Difference]: With dead ends: 52953 [2021-12-17 21:01:54,200 INFO L226 Difference]: Without dead ends: 52951 [2021-12-17 21:01:54,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:01:54,223 INFO L933 BasicCegarLoop]: 1685 mSDtfsCounter, 900 mSDsluCounter, 9383 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 11068 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:01:54,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 11068 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52951 states. [2021-12-17 21:01:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52951 to 34095. [2021-12-17 21:01:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34095 states, 34093 states have (on average 1.4335494089695833) internal successors, (48874), 34094 states have internal predecessors, (48874), 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) [2021-12-17 21:01:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34095 states to 34095 states and 48874 transitions. [2021-12-17 21:01:55,936 INFO L78 Accepts]: Start accepts. Automaton has 34095 states and 48874 transitions. Word has length 109 [2021-12-17 21:01:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:55,936 INFO L470 AbstractCegarLoop]: Abstraction has 34095 states and 48874 transitions. [2021-12-17 21:01:55,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 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) [2021-12-17 21:01:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 34095 states and 48874 transitions. [2021-12-17 21:01:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 21:01:55,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:55,938 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:55,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:01:55,938 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2021-12-17 21:01:55,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:55,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018727689] [2021-12-17 21:01:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:55,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:01:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:01:55,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:01:55,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018727689] [2021-12-17 21:01:55,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018727689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:01:55,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:01:55,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:01:55,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038450604] [2021-12-17 21:01:55,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:01:55,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:01:55,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:01:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:01:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:01:55,981 INFO L87 Difference]: Start difference. First operand 34095 states and 48874 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-12-17 21:01:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:01:57,711 INFO L93 Difference]: Finished difference Result 61750 states and 89328 transitions. [2021-12-17 21:01:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:01:57,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2021-12-17 21:01:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:01:57,776 INFO L225 Difference]: With dead ends: 61750 [2021-12-17 21:01:57,776 INFO L226 Difference]: Without dead ends: 46899 [2021-12-17 21:01:57,804 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:01:57,806 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 1549 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1852 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 [2021-12-17 21:01:57,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1852 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:01:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46899 states. [2021-12-17 21:01:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46899 to 46897. [2021-12-17 21:01:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46897 states, 46895 states have (on average 1.4325621068344174) internal successors, (67180), 46896 states have internal predecessors, (67180), 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) [2021-12-17 21:01:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46897 states to 46897 states and 67180 transitions. [2021-12-17 21:01:59,950 INFO L78 Accepts]: Start accepts. Automaton has 46897 states and 67180 transitions. Word has length 110 [2021-12-17 21:01:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:01:59,950 INFO L470 AbstractCegarLoop]: Abstraction has 46897 states and 67180 transitions. [2021-12-17 21:01:59,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-12-17 21:01:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 46897 states and 67180 transitions. [2021-12-17 21:01:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 21:01:59,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:01:59,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:01:59,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:01:59,972 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:01:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:01:59,973 INFO L85 PathProgramCache]: Analyzing trace with hash 635734382, now seen corresponding path program 1 times [2021-12-17 21:01:59,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:01:59,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563823048] [2021-12-17 21:01:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:01:59,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:01:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:02:00,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:00,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563823048] [2021-12-17 21:02:00,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563823048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:00,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:00,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:02:00,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676604243] [2021-12-17 21:02:00,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:00,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:02:00,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:02:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:02:00,077 INFO L87 Difference]: Start difference. First operand 46897 states and 67180 transitions. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 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)