./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label59.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label59.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 2d68e7262b60a12a6597b15e2848fbc8314c4945758acd933fd69212a55e4a41 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:49:21,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:49:21,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:49:21,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:49:21,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:49:21,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:49:21,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:49:21,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:49:21,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:49:22,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:49:22,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:49:22,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:49:22,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:49:22,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:49:22,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:49:22,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:49:22,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:49:22,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:49:22,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:49:22,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:49:22,008 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:49:22,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:49:22,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:49:22,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:49:22,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:49:22,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:49:22,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:49:22,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:49:22,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:49:22,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:49:22,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:49:22,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:49:22,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:49:22,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:49:22,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:49:22,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:49:22,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:49:22,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:49:22,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:49:22,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:49:22,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:49:22,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:49:22,019 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:49:22,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:49:22,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:49:22,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:49:22,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:49:22,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:49:22,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:49:22,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:49:22,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:49:22,038 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:49:22,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:49:22,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:49:22,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:49:22,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:49:22,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:49:22,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:49:22,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:49:22,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:49:22,040 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:49:22,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:49:22,041 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:49:22,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:49:22,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:49:22,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:49:22,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:49:22,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:49:22,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:49:22,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:49:22,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:49:22,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:49:22,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:49:22,042 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:49:22,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:49:22,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:49:22,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d68e7262b60a12a6597b15e2848fbc8314c4945758acd933fd69212a55e4a41 [2022-07-13 11:49:22,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:49:22,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:49:22,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:49:22,240 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:49:22,241 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:49:22,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2022-07-13 11:49:22,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6800802/1da64f51f5bf4580b3c7601d96a2be11/FLAG45c877a7a [2022-07-13 11:49:22,767 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:49:22,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2022-07-13 11:49:22,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6800802/1da64f51f5bf4580b3c7601d96a2be11/FLAG45c877a7a [2022-07-13 11:49:23,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6800802/1da64f51f5bf4580b3c7601d96a2be11 [2022-07-13 11:49:23,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:49:23,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:49:23,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:49:23,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:49:23,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:49:23,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f39946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23, skipping insertion in model container [2022-07-13 11:49:23,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:49:23,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:49:23,650 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/eca-rers2012/Problem03_label59.c[57711,57724] [2022-07-13 11:49:23,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:49:23,678 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:49:23,814 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/eca-rers2012/Problem03_label59.c[57711,57724] [2022-07-13 11:49:23,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:49:23,838 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:49:23,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23 WrapperNode [2022-07-13 11:49:23,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:49:23,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:49:23,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:49:23,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:49:23,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,952 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-13 11:49:23,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:49:23,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:49:23,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:49:23,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:49:23,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:23,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:24,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:24,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:49:24,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:49:24,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:49:24,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:49:24,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (1/1) ... [2022-07-13 11:49:24,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:49:24,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:24,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 11:49:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:49:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:49:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:49:24,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:49:24,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 11:49:24,146 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:49:24,147 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:49:25,243 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:49:25,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:49:25,257 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:49:25,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:49:25 BoogieIcfgContainer [2022-07-13 11:49:25,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:49:25,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:49:25,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:49:25,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:49:25,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:49:23" (1/3) ... [2022-07-13 11:49:25,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af78d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:49:25, skipping insertion in model container [2022-07-13 11:49:25,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:23" (2/3) ... [2022-07-13 11:49:25,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af78d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:49:25, skipping insertion in model container [2022-07-13 11:49:25,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:49:25" (3/3) ... [2022-07-13 11:49:25,267 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label59.c [2022-07-13 11:49:25,277 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:49:25,277 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:49:25,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:49:25,333 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@383f229c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@196df6c [2022-07-13 11:49:25,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:49:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-13 11:49:25,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:25,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:25,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash -825651366, now seen corresponding path program 1 times [2022-07-13 11:49:25,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:25,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318894448] [2022-07-13 11:49:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:25,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:25,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:25,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318894448] [2022-07-13 11:49:25,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318894448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:25,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:25,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95137593] [2022-07-13 11:49:25,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:25,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:25,915 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:26,676 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-07-13 11:49:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2022-07-13 11:49:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:26,688 INFO L225 Difference]: With dead ends: 864 [2022-07-13 11:49:26,688 INFO L226 Difference]: Without dead ends: 468 [2022-07-13 11:49:26,693 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:49:26,695 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:26,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-07-13 11:49:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-07-13 11:49:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-07-13 11:49:26,747 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 174 [2022-07-13 11:49:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:26,748 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-07-13 11:49:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-07-13 11:49:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 11:49:26,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:26,755 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:49:26,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash -206951382, now seen corresponding path program 1 times [2022-07-13 11:49:26,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439067831] [2022-07-13 11:49:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:26,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439067831] [2022-07-13 11:49:26,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439067831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:26,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:26,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:26,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381310090] [2022-07-13 11:49:26,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:26,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:26,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:26,840 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:27,500 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2022-07-13 11:49:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 179 [2022-07-13 11:49:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:27,507 INFO L225 Difference]: With dead ends: 1330 [2022-07-13 11:49:27,507 INFO L226 Difference]: Without dead ends: 878 [2022-07-13 11:49:27,508 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:49:27,509 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:27,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 163 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-07-13 11:49:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2022-07-13 11:49:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2022-07-13 11:49:27,582 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 179 [2022-07-13 11:49:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:27,582 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2022-07-13 11:49:27,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2022-07-13 11:49:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-13 11:49:27,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:27,586 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:49:27,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash -834312519, now seen corresponding path program 1 times [2022-07-13 11:49:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:27,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647363503] [2022-07-13 11:49:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:27,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647363503] [2022-07-13 11:49:27,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647363503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:27,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:27,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565722319] [2022-07-13 11:49:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:27,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:27,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:27,704 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:28,400 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2022-07-13 11:49:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-07-13 11:49:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:28,406 INFO L225 Difference]: With dead ends: 2575 [2022-07-13 11:49:28,406 INFO L226 Difference]: Without dead ends: 1703 [2022-07-13 11:49:28,408 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:49:28,413 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:28,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-07-13 11:49:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2022-07-13 11:49:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.4994068801897984) internal successors, (2528), 1686 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2528 transitions. [2022-07-13 11:49:28,483 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2528 transitions. Word has length 182 [2022-07-13 11:49:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:28,484 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2528 transitions. [2022-07-13 11:49:28,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2528 transitions. [2022-07-13 11:49:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-13 11:49:28,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:28,489 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:28,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:49:28,489 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:28,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:28,490 INFO L85 PathProgramCache]: Analyzing trace with hash 994201524, now seen corresponding path program 1 times [2022-07-13 11:49:28,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:28,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956991594] [2022-07-13 11:49:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:28,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:28,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:28,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956991594] [2022-07-13 11:49:28,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956991594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:28,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:28,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:28,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423107192] [2022-07-13 11:49:28,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:28,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:28,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:28,592 INFO L87 Difference]: Start difference. First operand 1687 states and 2528 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:29,162 INFO L93 Difference]: Finished difference Result 4194 states and 6266 transitions. [2022-07-13 11:49:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2022-07-13 11:49:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:29,171 INFO L225 Difference]: With dead ends: 4194 [2022-07-13 11:49:29,171 INFO L226 Difference]: Without dead ends: 2509 [2022-07-13 11:49:29,175 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:49:29,182 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:29,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 113 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2022-07-13 11:49:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2022-07-13 11:49:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4670921420023932) internal successors, (3678), 2507 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3678 transitions. [2022-07-13 11:49:29,250 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3678 transitions. Word has length 184 [2022-07-13 11:49:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:29,250 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 3678 transitions. [2022-07-13 11:49:29,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3678 transitions. [2022-07-13 11:49:29,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-13 11:49:29,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:29,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:49:29,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2049388324, now seen corresponding path program 1 times [2022-07-13 11:49:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684363242] [2022-07-13 11:49:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:29,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:29,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684363242] [2022-07-13 11:49:29,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684363242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256660495] [2022-07-13 11:49:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:29,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:29,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:29,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:29,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:49:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:49:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:49:29,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:29,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256660495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:29,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:29,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 11:49:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711012871] [2022-07-13 11:49:29,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:29,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:29,773 INFO L87 Difference]: Start difference. First operand 2508 states and 3678 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:30,503 INFO L93 Difference]: Finished difference Result 7453 states and 10941 transitions. [2022-07-13 11:49:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 189 [2022-07-13 11:49:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:30,518 INFO L225 Difference]: With dead ends: 7453 [2022-07-13 11:49:30,521 INFO L226 Difference]: Without dead ends: 4947 [2022-07-13 11:49:30,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:30,525 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 58 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:30,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 429 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2022-07-13 11:49:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 4133. [2022-07-13 11:49:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 1.334220716360116) internal successors, (5513), 4132 states have internal predecessors, (5513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 5513 transitions. [2022-07-13 11:49:30,588 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 5513 transitions. Word has length 189 [2022-07-13 11:49:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:30,589 INFO L495 AbstractCegarLoop]: Abstraction has 4133 states and 5513 transitions. [2022-07-13 11:49:30,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 5513 transitions. [2022-07-13 11:49:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-13 11:49:30,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:30,595 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:30,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:30,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:30,810 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:30,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1197556103, now seen corresponding path program 1 times [2022-07-13 11:49:30,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:30,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784077216] [2022-07-13 11:49:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:30,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:30,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784077216] [2022-07-13 11:49:30,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784077216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:30,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:30,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919338024] [2022-07-13 11:49:30,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:30,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:30,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:30,900 INFO L87 Difference]: Start difference. First operand 4133 states and 5513 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:31,415 INFO L93 Difference]: Finished difference Result 10305 states and 13690 transitions. [2022-07-13 11:49:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-07-13 11:49:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:31,431 INFO L225 Difference]: With dead ends: 10305 [2022-07-13 11:49:31,432 INFO L226 Difference]: Without dead ends: 6174 [2022-07-13 11:49:31,434 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:49:31,435 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:31,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 190 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:49:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2022-07-13 11:49:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 6163. [2022-07-13 11:49:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 1.295196364816618) internal successors, (7981), 6162 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 7981 transitions. [2022-07-13 11:49:31,519 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 7981 transitions. Word has length 193 [2022-07-13 11:49:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:31,519 INFO L495 AbstractCegarLoop]: Abstraction has 6163 states and 7981 transitions. [2022-07-13 11:49:31,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 7981 transitions. [2022-07-13 11:49:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-13 11:49:31,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:31,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:31,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:49:31,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash 357734460, now seen corresponding path program 1 times [2022-07-13 11:49:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:31,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363592160] [2022-07-13 11:49:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:31,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:31,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363592160] [2022-07-13 11:49:31,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363592160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59498315] [2022-07-13 11:49:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:31,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:31,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:49:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:49:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:49:31,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:31,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59498315] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:31,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:31,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 11:49:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389166567] [2022-07-13 11:49:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:31,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:31,771 INFO L87 Difference]: Start difference. First operand 6163 states and 7981 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:32,412 INFO L93 Difference]: Finished difference Result 15574 states and 20584 transitions. [2022-07-13 11:49:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:32,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 200 [2022-07-13 11:49:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:32,435 INFO L225 Difference]: With dead ends: 15574 [2022-07-13 11:49:32,435 INFO L226 Difference]: Without dead ends: 9413 [2022-07-13 11:49:32,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:32,444 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 225 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:32,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 168 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2022-07-13 11:49:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 9411. [2022-07-13 11:49:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9411 states, 9410 states have (on average 1.2464399574920297) internal successors, (11729), 9410 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9411 states to 9411 states and 11729 transitions. [2022-07-13 11:49:32,584 INFO L78 Accepts]: Start accepts. Automaton has 9411 states and 11729 transitions. Word has length 200 [2022-07-13 11:49:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:32,585 INFO L495 AbstractCegarLoop]: Abstraction has 9411 states and 11729 transitions. [2022-07-13 11:49:32,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 9411 states and 11729 transitions. [2022-07-13 11:49:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-13 11:49:32,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:32,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:32,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:32,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-13 11:49:32,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1745267993, now seen corresponding path program 1 times [2022-07-13 11:49:32,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:32,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339171500] [2022-07-13 11:49:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:32,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:32,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:32,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339171500] [2022-07-13 11:49:32,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339171500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:32,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836688497] [2022-07-13 11:49:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:32,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:32,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:32,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:49:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:49:33,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:49:33,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:33,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836688497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:33,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:33,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 11:49:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769522391] [2022-07-13 11:49:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:33,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:33,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:33,063 INFO L87 Difference]: Start difference. First operand 9411 states and 11729 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:33,725 INFO L93 Difference]: Finished difference Result 25743 states and 32195 transitions. [2022-07-13 11:49:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 201 [2022-07-13 11:49:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:33,748 INFO L225 Difference]: With dead ends: 25743 [2022-07-13 11:49:33,748 INFO L226 Difference]: Without dead ends: 16537 [2022-07-13 11:49:33,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:33,759 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 244 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:33,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 205 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16537 states. [2022-07-13 11:49:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16537 to 16331. [2022-07-13 11:49:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16331 states, 16330 states have (on average 1.2200857317819964) internal successors, (19924), 16330 states have internal predecessors, (19924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16331 states to 16331 states and 19924 transitions. [2022-07-13 11:49:33,935 INFO L78 Accepts]: Start accepts. Automaton has 16331 states and 19924 transitions. Word has length 201 [2022-07-13 11:49:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:33,935 INFO L495 AbstractCegarLoop]: Abstraction has 16331 states and 19924 transitions. [2022-07-13 11:49:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 16331 states and 19924 transitions. [2022-07-13 11:49:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-13 11:49:33,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:33,950 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:33,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:34,168 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2047108928, now seen corresponding path program 1 times [2022-07-13 11:49:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:34,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304839497] [2022-07-13 11:49:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:49:34,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:34,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304839497] [2022-07-13 11:49:34,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304839497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87758510] [2022-07-13 11:49:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:34,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:34,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:34,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:49:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:34,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:49:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 11:49:34,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:34,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87758510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:34,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:34,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:49:34,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307734827] [2022-07-13 11:49:34,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:34,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:34,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:34,565 INFO L87 Difference]: Start difference. First operand 16331 states and 19924 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:35,143 INFO L93 Difference]: Finished difference Result 32460 states and 39632 transitions. [2022-07-13 11:49:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:35,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 232 [2022-07-13 11:49:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:35,171 INFO L225 Difference]: With dead ends: 32460 [2022-07-13 11:49:35,172 INFO L226 Difference]: Without dead ends: 16334 [2022-07-13 11:49:35,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:35,189 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 97 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:35,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 342 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16334 states. [2022-07-13 11:49:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16334 to 15925. [2022-07-13 11:49:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15925 states, 15924 states have (on average 1.1967470484802814) internal successors, (19057), 15924 states have internal predecessors, (19057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15925 states to 15925 states and 19057 transitions. [2022-07-13 11:49:35,408 INFO L78 Accepts]: Start accepts. Automaton has 15925 states and 19057 transitions. Word has length 232 [2022-07-13 11:49:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:35,408 INFO L495 AbstractCegarLoop]: Abstraction has 15925 states and 19057 transitions. [2022-07-13 11:49:35,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15925 states and 19057 transitions. [2022-07-13 11:49:35,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-13 11:49:35,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:35,424 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:35,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:35,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:35,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash 88987123, now seen corresponding path program 1 times [2022-07-13 11:49:35,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:35,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184709839] [2022-07-13 11:49:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184709839] [2022-07-13 11:49:35,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184709839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085333240] [2022-07-13 11:49:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:35,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:35,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:35,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:49:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:49:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 11:49:36,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:36,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085333240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:36,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:36,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-13 11:49:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934911299] [2022-07-13 11:49:36,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:49:36,042 INFO L87 Difference]: Start difference. First operand 15925 states and 19057 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:36,922 INFO L93 Difference]: Finished difference Result 41814 states and 50208 transitions. [2022-07-13 11:49:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 234 [2022-07-13 11:49:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:36,976 INFO L225 Difference]: With dead ends: 41814 [2022-07-13 11:49:36,991 INFO L226 Difference]: Without dead ends: 26094 [2022-07-13 11:49:37,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:49:37,027 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 78 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:37,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 392 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2022-07-13 11:49:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 26085. [2022-07-13 11:49:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26085 states, 26084 states have (on average 1.178155190921638) internal successors, (30731), 26084 states have internal predecessors, (30731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26085 states to 26085 states and 30731 transitions. [2022-07-13 11:49:37,453 INFO L78 Accepts]: Start accepts. Automaton has 26085 states and 30731 transitions. Word has length 234 [2022-07-13 11:49:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:37,454 INFO L495 AbstractCegarLoop]: Abstraction has 26085 states and 30731 transitions. [2022-07-13 11:49:37,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 26085 states and 30731 transitions. [2022-07-13 11:49:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-13 11:49:37,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:37,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:37,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:37,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 11:49:37,711 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1247796774, now seen corresponding path program 1 times [2022-07-13 11:49:37,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660600000] [2022-07-13 11:49:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:37,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:37,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660600000] [2022-07-13 11:49:37,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660600000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:37,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:37,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:37,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472008199] [2022-07-13 11:49:37,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:37,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:37,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:37,871 INFO L87 Difference]: Start difference. First operand 26085 states and 30731 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:38,517 INFO L93 Difference]: Finished difference Result 52578 states and 61935 transitions. [2022-07-13 11:49:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2022-07-13 11:49:38,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:38,611 INFO L225 Difference]: With dead ends: 52578 [2022-07-13 11:49:38,611 INFO L226 Difference]: Without dead ends: 26698 [2022-07-13 11:49:38,659 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:49:38,660 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 135 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:38,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 200 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26698 states. [2022-07-13 11:49:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26698 to 26694. [2022-07-13 11:49:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26694 states, 26693 states have (on average 1.176525680890121) internal successors, (31405), 26693 states have internal predecessors, (31405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26694 states to 26694 states and 31405 transitions. [2022-07-13 11:49:38,991 INFO L78 Accepts]: Start accepts. Automaton has 26694 states and 31405 transitions. Word has length 248 [2022-07-13 11:49:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:38,991 INFO L495 AbstractCegarLoop]: Abstraction has 26694 states and 31405 transitions. [2022-07-13 11:49:38,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 26694 states and 31405 transitions. [2022-07-13 11:49:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-13 11:49:39,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:39,012 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:39,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:49:39,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash 166986337, now seen corresponding path program 1 times [2022-07-13 11:49:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:39,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502050384] [2022-07-13 11:49:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:39,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 86 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-13 11:49:39,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:39,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502050384] [2022-07-13 11:49:39,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502050384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:39,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899184855] [2022-07-13 11:49:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:39,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:39,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:39,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:39,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:49:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:49:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-13 11:49:39,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:39,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899184855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:39,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:39,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:49:39,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458228806] [2022-07-13 11:49:39,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:39,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:39,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:39,361 INFO L87 Difference]: Start difference. First operand 26694 states and 31405 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:40,032 INFO L93 Difference]: Finished difference Result 51784 states and 60859 transitions. [2022-07-13 11:49:40,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:40,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-13 11:49:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:40,131 INFO L225 Difference]: With dead ends: 51784 [2022-07-13 11:49:40,132 INFO L226 Difference]: Without dead ends: 25498 [2022-07-13 11:49:40,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:40,169 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:40,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 363 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25498 states. [2022-07-13 11:49:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25498 to 25476. [2022-07-13 11:49:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25476 states, 25475 states have (on average 1.1650245338567222) internal successors, (29679), 25475 states have internal predecessors, (29679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25476 states to 25476 states and 29679 transitions. [2022-07-13 11:49:40,543 INFO L78 Accepts]: Start accepts. Automaton has 25476 states and 29679 transitions. Word has length 251 [2022-07-13 11:49:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:40,544 INFO L495 AbstractCegarLoop]: Abstraction has 25476 states and 29679 transitions. [2022-07-13 11:49:40,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 25476 states and 29679 transitions. [2022-07-13 11:49:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-07-13 11:49:40,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:40,566 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:40,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:40,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:40,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1658340997, now seen corresponding path program 1 times [2022-07-13 11:49:40,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:40,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621223460] [2022-07-13 11:49:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 11:49:40,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:40,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621223460] [2022-07-13 11:49:40,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621223460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:40,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271037179] [2022-07-13 11:49:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:40,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:40,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:40,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:49:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:49:41,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-13 11:49:41,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:41,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271037179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:41,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:41,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 11:49:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832617687] [2022-07-13 11:49:41,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:41,117 INFO L87 Difference]: Start difference. First operand 25476 states and 29679 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:41,475 INFO L93 Difference]: Finished difference Result 47873 states and 55925 transitions. [2022-07-13 11:49:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2022-07-13 11:49:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:41,498 INFO L225 Difference]: With dead ends: 47873 [2022-07-13 11:49:41,499 INFO L226 Difference]: Without dead ends: 23211 [2022-07-13 11:49:41,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:41,518 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:41,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:49:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23211 states. [2022-07-13 11:49:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23211 to 23211. [2022-07-13 11:49:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23211 states, 23210 states have (on average 1.1581214993537268) internal successors, (26880), 23210 states have internal predecessors, (26880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23211 states to 23211 states and 26880 transitions. [2022-07-13 11:49:41,882 INFO L78 Accepts]: Start accepts. Automaton has 23211 states and 26880 transitions. Word has length 274 [2022-07-13 11:49:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:41,882 INFO L495 AbstractCegarLoop]: Abstraction has 23211 states and 26880 transitions. [2022-07-13 11:49:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23211 states and 26880 transitions. [2022-07-13 11:49:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-07-13 11:49:41,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:41,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:49:41,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 11:49:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:42,181 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1218688759, now seen corresponding path program 1 times [2022-07-13 11:49:42,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:42,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632945695] [2022-07-13 11:49:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:42,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:42,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:42,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632945695] [2022-07-13 11:49:42,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632945695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:42,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645216735] [2022-07-13 11:49:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:42,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:42,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:42,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:42,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:49:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:49:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:42,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:42,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645216735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:42,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:42,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-13 11:49:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045464892] [2022-07-13 11:49:42,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:49:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:49:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:49:42,911 INFO L87 Difference]: Start difference. First operand 23211 states and 26880 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:43,800 INFO L93 Difference]: Finished difference Result 52320 states and 60821 transitions. [2022-07-13 11:49:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:49:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 311 [2022-07-13 11:49:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:43,830 INFO L225 Difference]: With dead ends: 52320 [2022-07-13 11:49:43,831 INFO L226 Difference]: Without dead ends: 29923 [2022-07-13 11:49:43,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:49:43,845 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 541 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:43,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 137 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29923 states. [2022-07-13 11:49:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29923 to 25032. [2022-07-13 11:49:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25032 states, 25031 states have (on average 1.121609204586313) internal successors, (28075), 25031 states have internal predecessors, (28075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25032 states to 25032 states and 28075 transitions. [2022-07-13 11:49:44,102 INFO L78 Accepts]: Start accepts. Automaton has 25032 states and 28075 transitions. Word has length 311 [2022-07-13 11:49:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:44,102 INFO L495 AbstractCegarLoop]: Abstraction has 25032 states and 28075 transitions. [2022-07-13 11:49:44,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 25032 states and 28075 transitions. [2022-07-13 11:49:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-07-13 11:49:44,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:44,120 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:44,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 11:49:44,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash -669505154, now seen corresponding path program 1 times [2022-07-13 11:49:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:44,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428089176] [2022-07-13 11:49:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-13 11:49:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:44,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428089176] [2022-07-13 11:49:44,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428089176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:44,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:44,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421384594] [2022-07-13 11:49:44,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:44,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:49:44,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:49:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:49:44,498 INFO L87 Difference]: Start difference. First operand 25032 states and 28075 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:45,404 INFO L93 Difference]: Finished difference Result 51301 states and 57738 transitions. [2022-07-13 11:49:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:49:45,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 318 [2022-07-13 11:49:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:45,434 INFO L225 Difference]: With dead ends: 51301 [2022-07-13 11:49:45,434 INFO L226 Difference]: Without dead ends: 27083 [2022-07-13 11:49:45,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:49:45,452 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 345 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:45,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 92 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:49:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27083 states. [2022-07-13 11:49:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27083 to 27072. [2022-07-13 11:49:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27072 states, 27071 states have (on average 1.1232684422444683) internal successors, (30408), 27071 states have internal predecessors, (30408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27072 states to 27072 states and 30408 transitions. [2022-07-13 11:49:45,787 INFO L78 Accepts]: Start accepts. Automaton has 27072 states and 30408 transitions. Word has length 318 [2022-07-13 11:49:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:45,787 INFO L495 AbstractCegarLoop]: Abstraction has 27072 states and 30408 transitions. [2022-07-13 11:49:45,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 27072 states and 30408 transitions. [2022-07-13 11:49:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-13 11:49:45,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:45,805 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:45,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:49:45,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash 680421824, now seen corresponding path program 1 times [2022-07-13 11:49:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622525151] [2022-07-13 11:49:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-13 11:49:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622525151] [2022-07-13 11:49:45,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622525151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921275673] [2022-07-13 11:49:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:45,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:45,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:45,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 11:49:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:49:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 11:49:46,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:46,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921275673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:46,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:46,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:49:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443773688] [2022-07-13 11:49:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:46,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:46,048 INFO L87 Difference]: Start difference. First operand 27072 states and 30408 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:46,624 INFO L93 Difference]: Finished difference Result 50673 states and 56687 transitions. [2022-07-13 11:49:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 324 [2022-07-13 11:49:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:46,646 INFO L225 Difference]: With dead ends: 50673 [2022-07-13 11:49:46,646 INFO L226 Difference]: Without dead ends: 24415 [2022-07-13 11:49:46,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:46,663 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 215 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:46,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 331 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24415 states. [2022-07-13 11:49:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24415 to 23805. [2022-07-13 11:49:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23805 states, 23804 states have (on average 1.0905310031927407) internal successors, (25959), 23804 states have internal predecessors, (25959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23805 states to 23805 states and 25959 transitions. [2022-07-13 11:49:46,960 INFO L78 Accepts]: Start accepts. Automaton has 23805 states and 25959 transitions. Word has length 324 [2022-07-13 11:49:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:46,960 INFO L495 AbstractCegarLoop]: Abstraction has 23805 states and 25959 transitions. [2022-07-13 11:49:46,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 23805 states and 25959 transitions. [2022-07-13 11:49:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-07-13 11:49:46,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:46,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:46,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:47,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 11:49:47,193 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1485039348, now seen corresponding path program 1 times [2022-07-13 11:49:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:47,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061722281] [2022-07-13 11:49:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-07-13 11:49:47,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:47,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061722281] [2022-07-13 11:49:47,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061722281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218538818] [2022-07-13 11:49:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:47,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:47,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:47,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:47,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 11:49:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:49:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 11:49:47,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:47,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218538818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:47,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:47,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:49:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488465687] [2022-07-13 11:49:47,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:47,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:47,408 INFO L87 Difference]: Start difference. First operand 23805 states and 25959 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:47,726 INFO L93 Difference]: Finished difference Result 65506 states and 71458 transitions. [2022-07-13 11:49:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:47,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 330 [2022-07-13 11:49:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:47,767 INFO L225 Difference]: With dead ends: 65506 [2022-07-13 11:49:47,767 INFO L226 Difference]: Without dead ends: 42515 [2022-07-13 11:49:47,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:47,785 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 298 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:47,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 856 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:49:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42515 states. [2022-07-13 11:49:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42515 to 42512. [2022-07-13 11:49:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42512 states, 42511 states have (on average 1.0823551551363177) internal successors, (46012), 42511 states have internal predecessors, (46012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42512 states to 42512 states and 46012 transitions. [2022-07-13 11:49:48,182 INFO L78 Accepts]: Start accepts. Automaton has 42512 states and 46012 transitions. Word has length 330 [2022-07-13 11:49:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:48,182 INFO L495 AbstractCegarLoop]: Abstraction has 42512 states and 46012 transitions. [2022-07-13 11:49:48,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42512 states and 46012 transitions. [2022-07-13 11:49:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-07-13 11:49:48,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:48,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:49:48,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:49:48,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 11:49:48,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 274743730, now seen corresponding path program 1 times [2022-07-13 11:49:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:48,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209243727] [2022-07-13 11:49:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:48,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-13 11:49:48,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:48,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209243727] [2022-07-13 11:49:48,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209243727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:48,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:48,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187164278] [2022-07-13 11:49:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:48,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:48,513 INFO L87 Difference]: Start difference. First operand 42512 states and 46012 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:49,257 INFO L93 Difference]: Finished difference Result 97430 states and 105471 transitions. [2022-07-13 11:49:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 332 [2022-07-13 11:49:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:49,313 INFO L225 Difference]: With dead ends: 97430 [2022-07-13 11:49:49,314 INFO L226 Difference]: Without dead ends: 55732 [2022-07-13 11:49:49,343 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:49:49,343 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 203 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:49,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 128 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55732 states. [2022-07-13 11:49:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55732 to 55727. [2022-07-13 11:49:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55727 states, 55726 states have (on average 1.078724473315867) internal successors, (60113), 55726 states have internal predecessors, (60113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55727 states to 55727 states and 60113 transitions. [2022-07-13 11:49:50,231 INFO L78 Accepts]: Start accepts. Automaton has 55727 states and 60113 transitions. Word has length 332 [2022-07-13 11:49:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:50,231 INFO L495 AbstractCegarLoop]: Abstraction has 55727 states and 60113 transitions. [2022-07-13 11:49:50,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 55727 states and 60113 transitions. [2022-07-13 11:49:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-13 11:49:50,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:50,268 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-07-13 11:49:50,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 11:49:50,269 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash 844922251, now seen corresponding path program 1 times [2022-07-13 11:49:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:50,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840450015] [2022-07-13 11:49:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:50,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 175 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-13 11:49:50,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840450015] [2022-07-13 11:49:50,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840450015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993077353] [2022-07-13 11:49:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:50,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:50,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 11:49:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:49:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-13 11:49:50,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:50,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993077353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:50,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:50,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 11:49:50,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710171511] [2022-07-13 11:49:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:50,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:50,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:50,793 INFO L87 Difference]: Start difference. First operand 55727 states and 60113 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:51,321 INFO L93 Difference]: Finished difference Result 162506 states and 175339 transitions. [2022-07-13 11:49:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:51,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 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 346 [2022-07-13 11:49:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:51,473 INFO L225 Difference]: With dead ends: 162506 [2022-07-13 11:49:51,474 INFO L226 Difference]: Without dead ends: 108202 [2022-07-13 11:49:51,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:51,519 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 211 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:51,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 525 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:49:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108202 states. [2022-07-13 11:49:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108202 to 108200. [2022-07-13 11:49:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108200 states, 108199 states have (on average 1.0788731873677206) internal successors, (116733), 108199 states have internal predecessors, (116733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108200 states to 108200 states and 116733 transitions. [2022-07-13 11:49:53,139 INFO L78 Accepts]: Start accepts. Automaton has 108200 states and 116733 transitions. Word has length 346 [2022-07-13 11:49:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:53,140 INFO L495 AbstractCegarLoop]: Abstraction has 108200 states and 116733 transitions. [2022-07-13 11:49:53,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 108200 states and 116733 transitions. [2022-07-13 11:49:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-07-13 11:49:53,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:53,182 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:53,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 11:49:53,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:53,399 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:53,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:53,399 INFO L85 PathProgramCache]: Analyzing trace with hash -624714821, now seen corresponding path program 1 times [2022-07-13 11:49:53,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:53,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542471802] [2022-07-13 11:49:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:53,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-13 11:49:53,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542471802] [2022-07-13 11:49:53,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542471802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686820653] [2022-07-13 11:49:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:53,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:53,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:53,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 11:49:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:49:53,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-13 11:49:53,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:53,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686820653] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:53,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:53,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:49:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54004362] [2022-07-13 11:49:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:53,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:53,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:53,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:53,941 INFO L87 Difference]: Start difference. First operand 108200 states and 116733 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:55,208 INFO L93 Difference]: Finished difference Result 208871 states and 225264 transitions. [2022-07-13 11:49:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 348 [2022-07-13 11:49:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:55,391 INFO L225 Difference]: With dead ends: 208871 [2022-07-13 11:49:55,391 INFO L226 Difference]: Without dead ends: 102094 [2022-07-13 11:49:55,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:49:55,436 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 76 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:55,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 316 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102094 states. [2022-07-13 11:49:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102094 to 94165. [2022-07-13 11:49:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94165 states, 94164 states have (on average 1.0666921541140988) internal successors, (100444), 94164 states have internal predecessors, (100444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94165 states to 94165 states and 100444 transitions. [2022-07-13 11:49:56,631 INFO L78 Accepts]: Start accepts. Automaton has 94165 states and 100444 transitions. Word has length 348 [2022-07-13 11:49:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:56,632 INFO L495 AbstractCegarLoop]: Abstraction has 94165 states and 100444 transitions. [2022-07-13 11:49:56,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 94165 states and 100444 transitions. [2022-07-13 11:49:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-07-13 11:49:56,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:56,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:56,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 11:49:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:56,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:56,884 INFO L85 PathProgramCache]: Analyzing trace with hash 43010546, now seen corresponding path program 1 times [2022-07-13 11:49:56,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:56,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007064784] [2022-07-13 11:49:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:56,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 148 proven. 6 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-07-13 11:49:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007064784] [2022-07-13 11:49:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007064784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888018857] [2022-07-13 11:49:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:57,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:57,001 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:49:57,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 11:49:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:49:57,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 207 proven. 113 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-13 11:49:57,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:49:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 207 proven. 113 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-13 11:49:57,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888018857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:49:57,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:49:57,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-13 11:49:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701843642] [2022-07-13 11:49:57,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:49:57,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:49:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:49:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:49:57,888 INFO L87 Difference]: Start difference. First operand 94165 states and 100444 transitions. Second operand has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:50:01,094 INFO L93 Difference]: Finished difference Result 331856 states and 354907 transitions. [2022-07-13 11:50:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:50:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 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 382 [2022-07-13 11:50:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:50:01,432 INFO L225 Difference]: With dead ends: 331856 [2022-07-13 11:50:01,433 INFO L226 Difference]: Without dead ends: 239112 [2022-07-13 11:50:01,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:50:01,491 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2614 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3550 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2614 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 4115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 3550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:50:01,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2614 Valid, 248 Invalid, 4115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 3550 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:50:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239112 states. [2022-07-13 11:50:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239112 to 227895. [2022-07-13 11:50:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227895 states, 227894 states have (on average 1.0681237768436203) internal successors, (243419), 227894 states have internal predecessors, (243419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227895 states to 227895 states and 243419 transitions. [2022-07-13 11:50:04,842 INFO L78 Accepts]: Start accepts. Automaton has 227895 states and 243419 transitions. Word has length 382 [2022-07-13 11:50:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:50:04,842 INFO L495 AbstractCegarLoop]: Abstraction has 227895 states and 243419 transitions. [2022-07-13 11:50:04,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 227895 states and 243419 transitions. [2022-07-13 11:50:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-07-13 11:50:05,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:50:05,255 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-07-13 11:50:05,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 11:50:05,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-13 11:50:05,472 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:50:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:50:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash -947251325, now seen corresponding path program 1 times [2022-07-13 11:50:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:50:05,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767303364] [2022-07-13 11:50:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:50:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 623 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2022-07-13 11:50:05,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:50:05,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767303364] [2022-07-13 11:50:05,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767303364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:50:05,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:50:05,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:50:05,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705932952] [2022-07-13 11:50:05,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:50:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:50:05,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:50:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:50:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:50:05,724 INFO L87 Difference]: Start difference. First operand 227895 states and 243419 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:50:08,003 INFO L93 Difference]: Finished difference Result 638142 states and 682513 transitions. [2022-07-13 11:50:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:50:08,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 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 528 [2022-07-13 11:50:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:50:08,605 INFO L225 Difference]: With dead ends: 638142 [2022-07-13 11:50:08,605 INFO L226 Difference]: Without dead ends: 411670 [2022-07-13 11:50:08,678 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:50:08,680 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 199 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:50:08,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 530 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:50:08,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411670 states. [2022-07-13 11:50:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411670 to 406149. [2022-07-13 11:50:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406149 states, 406148 states have (on average 1.070548174557058) internal successors, (434801), 406148 states have internal predecessors, (434801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406149 states to 406149 states and 434801 transitions. [2022-07-13 11:50:14,997 INFO L78 Accepts]: Start accepts. Automaton has 406149 states and 434801 transitions. Word has length 528 [2022-07-13 11:50:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:50:14,998 INFO L495 AbstractCegarLoop]: Abstraction has 406149 states and 434801 transitions. [2022-07-13 11:50:14,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 406149 states and 434801 transitions. [2022-07-13 11:50:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2022-07-13 11:50:15,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:50:15,132 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-07-13 11:50:15,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 11:50:15,133 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:50:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:50:15,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1128811880, now seen corresponding path program 1 times [2022-07-13 11:50:15,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:50:15,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110035270] [2022-07-13 11:50:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:15,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:50:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 598 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-07-13 11:50:15,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:50:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110035270] [2022-07-13 11:50:15,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110035270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:50:15,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:50:15,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:50:15,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025506046] [2022-07-13 11:50:15,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:50:15,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:50:15,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:50:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:50:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:50:15,302 INFO L87 Difference]: Start difference. First operand 406149 states and 434801 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:50:19,332 INFO L93 Difference]: Finished difference Result 1077775 states and 1152871 transitions. [2022-07-13 11:50:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:50:19,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 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 540 [2022-07-13 11:50:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:50:20,349 INFO L225 Difference]: With dead ends: 1077775 [2022-07-13 11:50:20,350 INFO L226 Difference]: Without dead ends: 673049 [2022-07-13 11:50:20,537 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:50:20,540 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 203 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:50:20,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 476 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:50:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673049 states.